Auto merge of #2890 - Turbo87:node, r=jtgeibel

Update `node` to v14.9.0

I've been using this version locally, and it seems that Heroku also supports it, so I guess there is not much reason to stay on v12 :)

r? `@jtgeibel`

Author: bors

package.json

@@ -116,7 +116,7 @@
     "timekeeper": "2.2.0"
   },
   "engines": {
-    "node": "^12.9.1",
+    "node": "^14.9.0",
     "npm": "^6.10.2"
   }
 }