diff --git a/package.json b/package.json
index 283147166c91818a195e1a9a429fd8b8bd9503df..86fb4abcc30b45882e3f11b48b9b9ae73b291004 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "semver": "5.4.1",
     "semver-stable": "2.0.4",
     "semver-utils": "1.1.1",
-    "showdown": "1.7.3",
+    "showdown": "1.7.4",
     "tmp": "0.0.33",
     "traverse": "0.6.6"
   },
diff --git a/yarn.lock b/yarn.lock
index ca2e5c7931b280a7e3f17493af814ac6b9f7147e..759aaedda5882d4a7f9bd1157915130c11d7209a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -71,8 +71,8 @@ acorn@^4.0.4:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-4.0.13.tgz#105495ae5361d697bd195c825192e1ad7f253787"
 
 acorn@^5.1.1:
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.1.1.tgz#53fe161111f912ab999ee887a90a0bc52822fd75"
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.1.2.tgz#911cb53e036807cf0fa778dc5d370fbd864246d7"
 
 agent-base@2:
   version "2.1.1"
@@ -481,7 +481,7 @@ babel-types@^6.18.0, babel-types@^6.24.1, babel-types@^6.26.0:
     lodash "^4.17.4"
     to-fast-properties "^1.0.3"
 
-babylon@^6.17.4, babylon@^6.18.0:
+babylon@^6.18.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.18.0.tgz#af2f3b88fa6f5c1e4c634d1a0f8eac4f55b395e3"
 
@@ -695,8 +695,8 @@ chokidar@^1.6.1:
     fsevents "^1.0.0"
 
 ci-info@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.0.0.tgz#dc5285f2b4e251821683681c381c3388f46ec534"
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.1.1.tgz#47b44df118c48d2597b56d342e7e25791060171a"
 
 circular-json@^0.3.1:
   version "0.3.3"
@@ -1042,11 +1042,15 @@ decompress-response@^3.2.0:
     mimic-response "^1.0.0"
 
 deep-eql@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-3.0.0.tgz#b9162a49cf4b54d911425975ac95d03e56448471"
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-3.0.1.tgz#dfc9404400ad1c8fe023e7da1df1c147c4b444df"
   dependencies:
     type-detect "^4.0.0"
 
+deep-equal@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/deep-equal/-/deep-equal-1.0.1.tgz#f5d260292b660e084eff4cdbc9f08ad3247448b5"
+
 deep-extend@~0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.2.tgz#48b699c27e334bf89f10892be432f6e4c7d34a7f"
@@ -1061,6 +1065,17 @@ default-require-extensions@^1.0.0:
   dependencies:
     strip-bom "^2.0.0"
 
+define-properties@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.2.tgz#83a73f2fea569898fb737193c8f873caf6d45c94"
+  dependencies:
+    foreach "^2.0.5"
+    object-keys "^1.0.8"
+
+defined@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
+
 del@^2.0.2:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/del/-/del-2.2.2.tgz#c12c981d067846c84bcaf862cff930d907ffd1a8"
@@ -1095,8 +1110,8 @@ dezalgo@^1.0.1:
     wrappy "1"
 
 diff@^3.2.0:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.0.tgz#056695150d7aa93237ca7e378ac3b1682b7963b9"
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
 
 doctrine@1.5.0:
   version "1.5.0"
@@ -1157,20 +1172,38 @@ error-ex@^1.2.0:
   dependencies:
     is-arrayish "^0.2.1"
 
+es-abstract@^1.5.0:
+  version "1.8.2"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.8.2.tgz#25103263dc4decbda60e0c737ca32313518027ee"
+  dependencies:
+    es-to-primitive "^1.1.1"
+    function-bind "^1.1.1"
+    has "^1.0.1"
+    is-callable "^1.1.3"
+    is-regex "^1.0.4"
+
+es-to-primitive@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.1.1.tgz#45355248a88979034b6792e19bb81f2b7975dd0d"
+  dependencies:
+    is-callable "^1.1.1"
+    is-date-object "^1.0.1"
+    is-symbol "^1.0.1"
+
 escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
 escodegen@^1.6.1:
-  version "1.8.1"
-  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.8.1.tgz#5a5b53af4693110bebb0867aa3430dd3b70a1018"
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.9.0.tgz#9811a2f265dc1cd3894420ee3717064b632b8852"
   dependencies:
-    esprima "^2.7.1"
-    estraverse "^1.9.1"
+    esprima "^3.1.3"
+    estraverse "^4.2.0"
     esutils "^2.0.2"
     optionator "^0.8.1"
   optionalDependencies:
-    source-map "~0.2.0"
+    source-map "~0.5.6"
 
 eslint-config-airbnb-base@11.3.2:
   version "11.3.2"
@@ -1284,9 +1317,9 @@ espree@^3.5.0:
     acorn "^5.1.1"
     acorn-jsx "^3.0.0"
 
-esprima@^2.7.1:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
+esprima@^3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
 
 esprima@^4.0.0:
   version "4.0.0"
@@ -1305,10 +1338,6 @@ esrecurse@^4.1.0:
     estraverse "^4.1.0"
     object-assign "^4.0.1"
 
-estraverse@^1.9.1:
-  version "1.9.3"
-  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-1.9.3.tgz#af67f2dc922582415950926091a4005d29c9bb44"
-
 estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
@@ -1330,8 +1359,8 @@ event-stream@^3.3.0:
     through "~2.3.1"
 
 exec-sh@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/exec-sh/-/exec-sh-0.2.0.tgz#14f75de3f20d286ef933099b2ce50a90359cef10"
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/exec-sh/-/exec-sh-0.2.1.tgz#163b98a6e89e6b65b47c2a28d215bc1f63989c38"
   dependencies:
     merge "^1.1.3"
 
@@ -1472,6 +1501,12 @@ follow-redirects@0.0.7:
     debug "^2.2.0"
     stream-consume "^0.1.0"
 
+for-each@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/for-each/-/for-each-0.3.2.tgz#2c40450b9348e97f281322593ba96704b9abd4d4"
+  dependencies:
+    is-function "~1.0.0"
+
 for-in@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -1482,6 +1517,10 @@ for-own@^0.1.4:
   dependencies:
     for-in "^1.0.1"
 
+foreach@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
+
 foreachasync@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/foreachasync/-/foreachasync-3.0.0.tgz#5502987dc8714be3392097f32e0071c9dee07cf6"
@@ -1550,7 +1589,7 @@ fstream@^1.0.0, fstream@^1.0.10, fstream@^1.0.2:
     mkdirp ">=0.5 0"
     rimraf "2"
 
-function-bind@^1.0.2:
+function-bind@^1.0.2, function-bind@^1.1.1, function-bind@~1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
 
@@ -1739,7 +1778,7 @@ glob@^6.0.1:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.2:
+glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.2, glob@~7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -1840,21 +1879,21 @@ has-flag@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
 
-has-symbol-support-x@^1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.0.tgz#442d89b1d0ac6cf5ff2f7b916ee539869b93a256"
+has-symbol-support-x@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/has-symbol-support-x/-/has-symbol-support-x-1.4.1.tgz#66ec2e377e0c7d7ccedb07a3a84d77510ff1bc4c"
 
 has-to-string-tag-x@^1.2.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/has-to-string-tag-x/-/has-to-string-tag-x-1.4.0.tgz#49d7bcde85c2409be38ac327e3e119a451657c7b"
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/has-to-string-tag-x/-/has-to-string-tag-x-1.4.1.tgz#a045ab383d7b4b2012a00148ab0aa5f290044d4d"
   dependencies:
-    has-symbol-support-x "^1.4.0"
+    has-symbol-support-x "^1.4.1"
 
 has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
 
-has@^1.0.1:
+has@^1.0.1, has@~1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/has/-/has-1.0.1.tgz#8461733f538b0837c9361e39a9ab9e9704dc2f28"
   dependencies:
@@ -1992,12 +2031,20 @@ is-builtin-module@^1.0.0:
   dependencies:
     builtin-modules "^1.0.0"
 
+is-callable@^1.1.1, is-callable@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.3.tgz#86eb75392805ddc33af71c92a0eedf74ee7604b2"
+
 is-ci@^1.0.10:
   version "1.0.10"
   resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
   dependencies:
     ci-info "^1.0.0"
 
+is-date-object@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
+
 is-dotfile@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/is-dotfile/-/is-dotfile-1.0.3.tgz#a6a2f32ffd2dfb04f5ca25ecd0f6b83cf798a1e1"
@@ -2032,6 +2079,10 @@ is-fullwidth-code-point@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz#a3b30a5c4f199183167aaab93beefae3ddfb654f"
 
+is-function@~1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-function/-/is-function-1.0.1.tgz#12cfb98b65b57dd3d193a3121f5f6e2f437602b5"
+
 is-glob@^2.0.0, is-glob@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-2.0.1.tgz#d096f926a3ded5600f3fdfd91198cb0888c2d863"
@@ -2103,6 +2154,12 @@ is-property@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-property/-/is-property-1.0.2.tgz#57fe1c4e48474edd65b09911f26b1cd4095dda84"
 
+is-regex@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.4.tgz#5517489b547091b0930e095654ced25ee97e9491"
+  dependencies:
+    has "^1.0.1"
+
 is-resolvable@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.0.0.tgz#8df57c61ea2e3c501408d100fb013cf8d6e0cc62"
@@ -2121,6 +2178,10 @@ is-subset@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/is-subset/-/is-subset-0.1.1.tgz#8a59117d932de1de00f245fcdd39ce43f1e939a6"
 
+is-symbol@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
+
 is-text-path@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-text-path/-/is-text-path-1.0.1.tgz#4e1aa0fb51bfbcb3e92688001397202c1775b66e"
@@ -2158,14 +2219,14 @@ isstream@~0.1.2:
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
 
 istanbul-api@^1.1.1:
-  version "1.1.13"
-  resolved "https://registry.yarnpkg.com/istanbul-api/-/istanbul-api-1.1.13.tgz#7197f64413600ebdfec6347a2dc3d4e03f97ed5a"
+  version "1.1.14"
+  resolved "https://registry.yarnpkg.com/istanbul-api/-/istanbul-api-1.1.14.tgz#25bc5701f7c680c0ffff913de46e3619a3a6e680"
   dependencies:
     async "^2.1.4"
     fileset "^2.0.2"
     istanbul-lib-coverage "^1.1.1"
     istanbul-lib-hook "^1.0.7"
-    istanbul-lib-instrument "^1.7.5"
+    istanbul-lib-instrument "^1.8.0"
     istanbul-lib-report "^1.1.1"
     istanbul-lib-source-maps "^1.2.1"
     istanbul-reports "^1.1.2"
@@ -2183,15 +2244,15 @@ istanbul-lib-hook@^1.0.7:
   dependencies:
     append-transform "^0.4.0"
 
-istanbul-lib-instrument@^1.4.2, istanbul-lib-instrument@^1.7.2, istanbul-lib-instrument@^1.7.5:
-  version "1.7.5"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.7.5.tgz#adb596f8f0cb8b95e739206351a38a586af21b1e"
+istanbul-lib-instrument@^1.4.2, istanbul-lib-instrument@^1.7.2, istanbul-lib-instrument@^1.8.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.8.0.tgz#66f6c9421cc9ec4704f76f2db084ba9078a2b532"
   dependencies:
     babel-generator "^6.18.0"
     babel-template "^6.16.0"
     babel-traverse "^6.18.0"
     babel-types "^6.18.0"
-    babylon "^6.17.4"
+    babylon "^6.18.0"
     istanbul-lib-coverage "^1.1.1"
     semver "^5.3.0"
 
@@ -2875,15 +2936,15 @@ micromatch@^2.1.5, micromatch@^2.3.11:
     parse-glob "^3.0.4"
     regex-cache "^0.4.2"
 
-mime-db@~1.29.0:
-  version "1.29.0"
-  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.29.0.tgz#48d26d235589651704ac5916ca06001914266878"
+mime-db@~1.30.0:
+  version "1.30.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.30.0.tgz#74c643da2dd9d6a45399963465b26d5ca7d71f01"
 
 mime-types@^2.1.11, mime-types@^2.1.12, mime-types@~2.1.7:
-  version "2.1.16"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.16.tgz#2b858a52e5ecd516db897ac2be87487830698e23"
+  version "2.1.17"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.17.tgz#09d7a393f03e995a79f8af857b70a9e0ab16557a"
   dependencies:
-    mime-db "~1.29.0"
+    mime-db "~1.30.0"
 
 mime@^1.2.11:
   version "1.4.0"
@@ -2907,7 +2968,7 @@ minimist@0.0.8:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
-minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0:
+minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0, minimist@~1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
@@ -2997,8 +3058,8 @@ node-notifier@^5.0.2:
     which "^1.2.12"
 
 node-pre-gyp@^0.6.36:
-  version "0.6.36"
-  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.36.tgz#db604112cb74e0d477554e9b505b17abddfab786"
+  version "0.6.37"
+  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.37.tgz#3c872b236b2e266e4140578fe1ee88f693323a05"
   dependencies:
     mkdirp "^0.5.1"
     nopt "^4.0.1"
@@ -3007,6 +3068,7 @@ node-pre-gyp@^0.6.36:
     request "^2.81.0"
     rimraf "^2.6.1"
     semver "^5.3.0"
+    tape "^4.6.3"
     tar "^2.2.1"
     tar-pack "^3.4.0"
 
@@ -3126,6 +3188,14 @@ object-assign@^4.0.1, object-assign@^4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
+object-inspect@~1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.3.0.tgz#5b1eb8e6742e2ee83342a637034d844928ba2f6d"
+
+object-keys@^1.0.8:
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.0.11.tgz#c54601778ad560f1142ce0e01bcca8b56d13426d"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -3515,11 +3585,10 @@ regenerator-runtime@^0.11.0:
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.0.tgz#7e54fe5b5ccd5d6624ea6255c3473be090b802e1"
 
 regex-cache@^0.4.2:
-  version "0.4.3"
-  resolved "https://registry.yarnpkg.com/regex-cache/-/regex-cache-0.4.3.tgz#9b1a6c35d4d0dfcef5711ae651e8e9d3d7114145"
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/regex-cache/-/regex-cache-0.4.4.tgz#75bdc58a2a1496cec48a12835bc54c8d562336dd"
   dependencies:
     is-equal-shallow "^0.1.3"
-    is-primitive "^2.0.0"
 
 registry-auth-token@3.3.1:
   version "3.3.1"
@@ -3666,7 +3735,7 @@ resolve@1.1.7:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
 
-resolve@^1.2.0, resolve@^1.3.2:
+resolve@^1.2.0, resolve@^1.3.2, resolve@~1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.4.0.tgz#a75be01c53da25d934a98ebd0e4c4a7312f92a86"
   dependencies:
@@ -3679,6 +3748,12 @@ restore-cursor@^2.0.0:
     onetime "^2.0.0"
     signal-exit "^3.0.2"
 
+resumer@~0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/resumer/-/resumer-0.0.0.tgz#f1e8f461e4064ba39e82af3cdc2a8c893d076759"
+  dependencies:
+    through "~2.3.4"
+
 retry@^0.10.0:
   version "0.10.1"
   resolved "https://registry.yarnpkg.com/retry/-/retry-0.10.1.tgz#e76388d217992c252750241d3d3956fed98d8ff4"
@@ -3834,9 +3909,9 @@ shellwords@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/shellwords/-/shellwords-0.1.1.tgz#d6b9181c1a48d397324c84871efbcfc73fc0654b"
 
-showdown@1.7.3:
-  version "1.7.3"
-  resolved "https://registry.yarnpkg.com/showdown/-/showdown-1.7.3.tgz#8d27f501a0850f33a0c25f1a6b7a10b9fc464633"
+showdown@1.7.4:
+  version "1.7.4"
+  resolved "https://registry.yarnpkg.com/showdown/-/showdown-1.7.4.tgz#6bbc9dd2cdb1e5fdd749ecdadc6a47b856594ae0"
   dependencies:
     yargs "^8.0.1"
 
@@ -3863,8 +3938,8 @@ sntp@1.x.x:
     hoek "2.x.x"
 
 source-map-support@^0.4.15:
-  version "0.4.16"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.4.16.tgz#16fecf98212467d017d586a2af68d628b9421cd8"
+  version "0.4.17"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.4.17.tgz#6f2150553e6375375d0ccb3180502b78c18ba430"
   dependencies:
     source-map "^0.5.6"
 
@@ -3874,16 +3949,10 @@ source-map@^0.4.4:
   dependencies:
     amdefine ">=0.0.4"
 
-source-map@^0.5.3, source-map@^0.5.6, source-map@~0.5.1:
+source-map@^0.5.3, source-map@^0.5.6, source-map@~0.5.1, source-map@~0.5.6:
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
 
-source-map@~0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.2.0.tgz#dab73fbcfc2ba819b4de03bd6f6eaa48164b3f9d"
-  dependencies:
-    amdefine ">=0.0.4"
-
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
@@ -3975,6 +4044,14 @@ string-width@^2.0.0, string-width@^2.1.0:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
+string.prototype.trim@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/string.prototype.trim/-/string.prototype.trim-1.1.2.tgz#d04de2c89e137f4d7d206f086b5ed2fae6be8cea"
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.5.0"
+    function-bind "^1.0.2"
+
 string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
@@ -4056,6 +4133,24 @@ table@^4.0.1:
     slice-ansi "0.0.4"
     string-width "^2.0.0"
 
+tape@^4.6.3:
+  version "4.8.0"
+  resolved "https://registry.yarnpkg.com/tape/-/tape-4.8.0.tgz#f6a9fec41cc50a1de50fa33603ab580991f6068e"
+  dependencies:
+    deep-equal "~1.0.1"
+    defined "~1.0.0"
+    for-each "~0.3.2"
+    function-bind "~1.1.0"
+    glob "~7.1.2"
+    has "~1.0.1"
+    inherits "~2.0.3"
+    minimist "~1.2.0"
+    object-inspect "~1.3.0"
+    resolve "~1.4.0"
+    resumer "~0.0.0"
+    string.prototype.trim "~1.1.2"
+    through "~2.3.8"
+
 tar-pack@^3.4.0:
   version "3.4.0"
   resolved "https://registry.yarnpkg.com/tar-pack/-/tar-pack-3.4.0.tgz#23be2d7f671a8339376cbdb0b8fe3fdebf317984"
@@ -4088,8 +4183,8 @@ test-exclude@^4.1.1:
     require-main-filename "^1.0.1"
 
 text-extensions@^1.0.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/text-extensions/-/text-extensions-1.5.0.tgz#d1cb2d14b5d0bc45bfdca8a08a473f68c7eb0cbc"
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/text-extensions/-/text-extensions-1.6.0.tgz#771561b26022783a45f5b6c2e78ad6e7de9fe322"
 
 text-table@~0.2.0:
   version "0.2.0"
@@ -4112,7 +4207,7 @@ through2@^2.0.0, through2@^2.0.2, through2@~2.0.0:
     readable-stream "^2.1.5"
     xtend "~4.0.1"
 
-through@2, "through@>=2.2.7 <3", through@^2.3.6, through@~2.3, through@~2.3.1:
+through@2, "through@>=2.2.7 <3", through@^2.3.6, through@~2.3, through@~2.3.1, through@~2.3.4, through@~2.3.8:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"