Update babel7 to the latest version 🚀 (#282)

* chore(package): update @babel/cli to version 7.6.2

* chore(package): update @babel/core to version 7.6.2

* chore(package): update @babel/plugin-proposal-object-rest-spread to version 7.6.2

* chore(package): update @babel/preset-env to version 7.6.2


Co-authored-by: null <23040076+greenkeeper[bot]@users.noreply.github.com>

Author: greenkeeper[bot]

package.json

@@ -62,10 +62,10 @@
     "vue": "^2.0.0"
   },
   "devDependencies": {
-    "@babel/cli": "7.6.0",
-    "@babel/core": "7.6.0",
-    "@babel/plugin-proposal-object-rest-spread": "7.5.5",
-    "@babel/preset-env": "7.6.0",
+    "@babel/cli": "7.6.2",
+    "@babel/core": "7.6.2",
+    "@babel/plugin-proposal-object-rest-spread": "7.6.2",
+    "@babel/preset-env": "7.6.2",
     "@vue/test-utils": "^1.0.0-beta.29",
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^24.8.0",