Use dev package renovate config

Author: WyriHaximus

.github/renovate.json

@@ -1,6 +1,6 @@
 {
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": [
- "github>WyriHaximus/renovate-config:php-package"
+ "github>WyriHaximus/renovate-config:php-package-dev"
  ]
 }