renovate: allow updates to 'unstable' versions for itemis Gradle plugins

Author: sergej-koscejev

.github/renovate.json5

@@ -20,6 +20,13 @@
       "allowedVersions": "/^.*-jre$/"
     },
 
+    {
+      // Allow 'unstable' versions for itemis Gradle plugins. Gradle versioning treats commit hashes with 'a' or 'b' as
+      // pre-releases but they are stable versions.
+      "matchPackageNames": ["de.itemis.mps*"],
+      "ignoreUnstable": false,
+    },
+
     {
       // MPS: separate minor and patch updates in order to disable minor but leave patch updates enabled
       "matchPackageNames": ["com.jetbrains:mps"],