Configure Renovate (#30)

Co-authored-by: Renovate Bot <[email protected]>

Author: joomla-dependency-bot

renovate.json

@@ -0,0 +1,11 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base",
+    ":preserveSemverRanges",
+    ":disableMajorUpdates"
+  ],
+  "versioning": "semver",
+  "dependencyDashboard": true,
+  "prHeader": "[![Renovate Joomla](https://camo.githubusercontent.com/80b6571d15d8ec7de8bd9f85a9f42e288ee0735c499641c2a6d05b346d552a52/68747470733a2f2f6170702e72656e6f76617465626f742e636f6d2f696d616765732f62616e6e65722e737667)](https://joomla.org)"
+}