chore(package): update @types/node to version 12.0.12

Closes #106

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "@types/enzyme": "^3.9.1",
     "@types/enzyme-adapter-react-16": "^1.0.5",
     "@types/jest": "^23.3.14",
-    "@types/node": "^11.13.7",
+    "@types/node": "^12.0.12",
     "@types/react": "^16.8.14",
     "@types/react-dom": "^16.8.4",
     "@types/react-hot-loader": "^4.1.0",