Upgrade babel dependencies

Author: kadamwhite

package.json

@@ -70,9 +70,9 @@
     "superagent": "^4.1.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.2.2",
+    "@babel/core": "^7.5.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.2.0",
-    "@babel/preset-env": "^7.2.3",
+    "@babel/preset-env": "^7.5.0",
     "babel-loader": "^8.0.4",
     "combyne": "^2.0.0",
     "eslint": "^4.19.1",