*: bump jb to 0.3.1 to be on par with latest tooling container

Makefile

@@ -63,4 +63,4 @@ test-in-docker:
 .PHONY: generate generate-in-docker test test-in-docker fmt
 
 $(JB_BINARY):
-	go get github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@v0.2.0
+	go get github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb@v0.3.1

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/googleapis/gnostic v0.0.0-20170729233727-0c5108395e2d // indirect
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be // indirect
-	github.com/jsonnet-bundler/jsonnet-bundler v0.2.0
+	github.com/jsonnet-bundler/jsonnet-bundler v0.3.1
 	github.com/kr/pretty v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.4 // indirect
 	github.com/mattn/go-isatty v0.0.10 // indirect

go.sum

@@ -28,6 +28,8 @@ github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be h1:AHimNtVIpiBjPU
 github.com/json-iterator/go v0.0.0-20180701071628-ab8a2e0c74be/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/jsonnet-bundler/jsonnet-bundler v0.2.0 h1:qL1v+2mjdEOmvNJp+ab+wQH81TQY71w1A666CRUg+1U=
 github.com/jsonnet-bundler/jsonnet-bundler v0.2.0/go.mod h1:/by7P/OoohkI3q4CgSFqcoFsVY+IaNbzOVDknEsKDeU=
+github.com/jsonnet-bundler/jsonnet-bundler v0.3.1 h1:KmNzitX12fFoyqjhU8cRifEB5D8x1NT1UAcK7FQ0zpY=
+github.com/jsonnet-bundler/jsonnet-bundler v0.3.1/go.mod h1:/by7P/OoohkI3q4CgSFqcoFsVY+IaNbzOVDknEsKDeU=
 github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
 github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=