Restore prepare:beta, introduce prepare:dev

.gitlab-ci.yml

@@ -31,8 +31,7 @@ stages:
       - version
       - build/**
 
-prepare:beta:
-  extends: .prepare
+prepare:dev:
   stage: prepare
   image: python:3.7-stretch
   script:
@@ -42,6 +41,12 @@ prepare:beta:
     - branches
   except:
     - master
+    - beta
+
+prepare:beta:
+  extends: .prepare
+  only:
+    - beta
 
 prepare:release:
   extends: .prepare