Update @types/node to the latest version 🚀 (#479)

* chore(package): update @types/node to version 11.9.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -57,7 +57,7 @@
     "@semantic-release/git": "^7.0.5",
     "@types/glob": "^7.1.1",
     "@types/mocha": "^5.2.5",
-    "@types/node": "^10.12.10",
+    "@types/node": "^11.9.0",
     "@types/semver": "^5.5.0",
     "@types/tmp": "0.0.33",
     "@types/xml2js": "^0.4.3",