Bump @types/node from 12.12.37 to 13.13.4 (#50)

Author: dependabot-preview[bot]

package.json

@@ -31,7 +31,7 @@
   "homepage": "https://github.com/fastify/fastify-redis#readme",
   "devDependencies": {
     "@types/ioredis": "^4.0.18",
-    "@types/node": "^12.11.1",
+    "@types/node": "^13.13.4",
     "fastify": "^3.0.0-rc.1",
     "proxyquire": "^2.1.3",
     "redis": "^3.0.2",