Update babel monorepo to v7.12.7

Author: renovate-bot

package.json

@@ -32,10 +32,10 @@
     "@aureooms/js-itertools": "^4.0.0"
   },
   "devDependencies": {
-    "@babel/cli": "7.12.1",
-    "@babel/core": "7.12.3",
+    "@babel/cli": "7.12.7",
+    "@babel/core": "7.12.7",
     "@babel/polyfill": "7.12.1",
-    "@babel/preset-env": "7.12.1",
+    "@babel/preset-env": "7.12.7",
     "@babel/register": "7.12.1",
     "ava": "3.13.0",
     "coveralls": "3.1.0",