feat(package.json): Update dependency @babel/core to v7.12.3

Author: renovate-bot

package.json

@@ -18,7 +18,7 @@
   },
   "dependencies": {
     "@babel/cli": "7.12.1",
-    "@babel/core": "7.12.1",
+    "@babel/core": "7.12.3",
     "@babel/plugin-transform-runtime": "7.12.1",
     "@babel/preset-env": "7.12.1",
     "@babel/runtime": "7.12.1",