gempush.yml in blurhash-0.1.5

- old
+ new

@@ -1,13 +1,10 @@
 name: Ruby Gem
 
 on:
-  pull_request:
-    branches:
-      - master
   push:
-    branches:
-      - master
+    tags:
+      - v*
 
 jobs:
   build:
     name: Build + Publish
     runs-on: ubuntu-latest