Update dependency @babel/core to v7.14.2

Author: renovate-bot

package.json

@@ -33,7 +33,7 @@
     "bluebird": "^3.5.1"
   },
   "devDependencies": {
-    "@babel/core": "^7.4.3",
+    "@babel/core": "7.14.2",
     "@types/jest": "^23.3.12",
     "@types/node": "^10.12.18",
     "@typescript-eslint/eslint-plugin": "^1.1.1",