chore: update babel monorepo to v7.8.7

Author: renovate-bot

package-lock.json

@@ -90,10 +90,10 @@
   },
   "devDependencies": {
     "@babel/cli": "7.8.4",
-    "@babel/core": "7.8.6",
+    "@babel/core": "7.8.7",
     "@babel/plugin-syntax-flow": "7.8.3",
     "@babel/plugin-transform-flow-strip-types": "7.8.3",
-    "@babel/preset-env": "7.8.6",
+    "@babel/preset-env": "7.8.7",
     "@babel/register": "7.8.6",
     "ava": "2.4.0",
     "babel-eslint": "10.1.0",