Add delete unstable release after push (#4136)

.github/workflows/delete-unstable-release.yml

@@ -0,0 +1,22 @@
+name: "Delete Unstable Release"
+
+on:
+  push:
+    branches:
+    - master
+
+jobs:
+  delete_unstable_release:
+    runs-on: ubuntu-latest
+    steps: 
+      - name: "Delete last unstable release"
+        uses: sgpublic/delete-release-action@v1.2
+        env: 
+          GITHUB_TOKEN: ${{ secrets.TOKEN }}
+        with:
+          release-drop: false
+          release-drop-tag: false
+          pre-release-drop: true
+          pre-release-keep-count: -1
+          pre-release-drop-tag: true
+

.travis.yml

@@ -2,6 +2,7 @@ sudo: required
 
 branches:
   except:
+    - unstable
     - weblate
 services:
   - docker
@@ -40,7 +41,7 @@ deploy:
     overwrite: true
     release_notes: "This is a build of the latest master which might contain bugs. Use at your own risk. Check releases section for the latest official release"
     prerelease: true
-    tag_name: unstable.$TAG
+    tag_name: unstable
     user: jekkos
 
     api_key: