fix(node): update schedule

data/node-js-schedule.json

@@ -47,7 +47,7 @@
     "start": "2018-04-24",
     "lts": "2018-10-30",
     "maintenance": "2020-04-01",
-    "end": "2021-04-01",
+    "end": "2021-04-30",
     "codename": "Dubnium"
   },
   "v11": {
@@ -57,21 +57,21 @@
   },
   "v12": {
     "start": "2019-04-23",
-    "lts": "2019-10-22",
-    "maintenance": "2021-04-01",
-    "end": "2022-04-01",
-    "codename": ""
+    "lts": "2019-10-21",
+    "maintenance": "2020-10-21",
+    "end": "2022-04-30",
+    "codename": "Erbium"
   },
   "v13": {
     "start": "2019-10-22",
-    "maintenance": "2020-04-20",
+    "maintenance": "2020-04-01",
     "end": "2020-06-01"
   },
   "v14": {
     "start": "2020-04-21",
     "lts": "2020-10-20",
-    "maintenance": "2022-04-01",
-    "end": "2023-04-01",
+    "maintenance": "2021-10-20",
+    "end": "2023-04-30",
     "codename": ""
   }
 }