chore(deps): update dependency @types/node to v11.13.0 (#662)

Author: renovate[bot]

package.json

@@ -83,7 +83,7 @@
     "@types/mime-types": "^2.1.0",
     "@types/mocha": "^5.2.3",
     "@types/nock": "^9.3.0",
-    "@types/node": "11.12.4",
+    "@types/node": "11.13.0",
     "@types/node-fetch": "^2.1.3",
     "@types/proxyquire": "^1.3.28",
     "@types/pumpify": "^1.4.1",