Fix GH workflow conditions (#298)

* Fix GH workflow conditions

* Remove PHP 8

Author: bytestream

.github/workflows/ci.yml

@@ -2,8 +2,6 @@ name: ci
 
 on:
   push:
-    branches:
-      - "master"
   pull_request:
 
 jobs:
@@ -12,7 +10,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [5.4, 5.5, 5.6, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0]
+        php: [5.4, 5.5, 5.6, 7.0, 7.1, 7.2, 7.3, 7.4]
 
     name: PHP ${{ matrix.php }}