chore(package): update @types/node to version 13.5.2

Closes #11

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "@commitlint/config-angular": "^8.0.0",
     "@nrfcloud/tslint-config": "^3.10.0",
     "@types/dotenv": "^6.1.1",
-    "@types/node": "^12.0.10",
+    "@types/node": "^13.5.2",
     "@types/node-fetch": "^2.3.7",
     "browser-sync": "^2.26.7",
     "husky": "^2.4.1",