feat(common): add best-practices (#16)

Reviewed-on: #16
Reviewed-by: branch-buddy <branch-buddy@t00n.de>
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

common.json

@@ -1,5 +1,6 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "dependencyDashboard": true,
-  "semanticCommits": "enabled"
+  "semanticCommits": "enabled",
+  "extends": ["config:best-practices"]
 }