chore(package): update @types/node to version 13.1.6

Closes #63

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "@types/jest": "^24.0.13",
     "@types/memory-fs": "^0.3.2",
     "@types/mini-css-extract-plugin": "^0.2.0",
-    "@types/node": "^12.0.2",
+    "@types/node": "^13.1.6",
     "@types/webpack-dev-server": "^3.1.1",
     "@types/webpack-merge": "^4.1.3",
     "jest": "^24.5.0",