chore(package): update @babel/core to version 7.5.0

Closes #38

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "react-dom": "^16.5.2"
   },
   "devDependencies": {
-    "@babel/core": "7.4.5",
+    "@babel/core": "7.5.0",
     "@babel/plugin-proposal-class-properties": "7.4.4",
     "@babel/plugin-proposal-decorators": "7.4.4",
     "@babel/plugin-proposal-export-namespace-from": "7.2.0",