fix(node): update node.js schedule

data/node-js-schedule.json

@@ -46,7 +46,7 @@
   "v10": {
     "start": "2018-04-24",
     "lts": "2018-10-30",
-    "maintenance": "2020-04-01",
+    "maintenance": "2020-04-30",
     "end": "2021-04-30",
     "codename": "Dubnium"
   },
@@ -58,7 +58,7 @@
   "v12": {
     "start": "2019-04-23",
     "lts": "2019-10-21",
-    "maintenance": "2020-10-21",
+    "maintenance": "2020-10-20",
     "end": "2022-04-30",
     "codename": "Erbium"
   },
@@ -70,7 +70,7 @@
   "v14": {
     "start": "2020-04-21",
     "lts": "2020-10-20",
-    "maintenance": "2021-10-20",
+    "maintenance": "2021-10-19",
     "end": "2023-04-30",
     "codename": ""
   }