Bump @types/node from 12.12.37 to 13.13.4 (#12)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 12.12.37 to 13.13.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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package.json

@@ -47,7 +47,7 @@
     "mqtt-packet": "^6.3.0"
   },
   "devDependencies": {
-    "@types/node": "^12.12.27",
+    "@types/node": "^13.13.4",
     "@typescript-eslint/eslint-plugin": "^2.19.0",
     "@typescript-eslint/parser": "^2.19.0",
     "faucet": "0.0.1",