config(renovate): switch to automergeType: branch (#2617)

To do this, we enable push builds on the `renovate/**` branches in
Github actions.

Author: gzm0

.github/workflows/ci.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - "renovate/**"
   pull_request:
 
 concurrency:

renovate.json

@@ -3,6 +3,7 @@
   "extends": [
     "config:js-lib"
   ],
+  "automergeType": "branch",
   "packageRules": [
     {
       "matchDepTypes": ["devDependencies"],