Enable CI builds for all versioned branches

Author: gsmet

.github/workflows/build-pr-development.yml

@@ -4,9 +4,7 @@ on:
   pull_request:
     branches:
       - development
-      - "2.2"
-      - "2.7"
-      - "2.13"
+      - "[0-9]+.[0-9]+"
 
 jobs:
   # This is a hack to work around a GitHub API limitation: