Update babel7 to the latest version 🚀 (#40)

* chore(package): update @babel/core to version 7.2.2

* chore(package): update @babel/preset-env to version 7.2.0

* chore(package): update lockfile yarn.lock

Author: greenkeeper[bot]

package.json

@@ -19,8 +19,8 @@
     "watch:warm": "serverless invoke local --watch --function hello --path fixtures/scheduled.json"
   },
   "devDependencies": {
-    "@babel/core": "7.1.6",
-    "@babel/preset-env": "7.1.6",
+    "@babel/core": "7.2.2",
+    "@babel/preset-env": "7.2.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^23.4.2",
     "babel-loader": "^8.0.0",