add GH CI

Author: efureev

.github/workflows/php.yml

@@ -37,7 +37,7 @@ jobs:
       fail-fast: false
       matrix:
         setup: [ 'basic', 'lowest', 'stable' ]
-        php: [ '8.0', '8.1' ]
+        php: [ '8.0' ]
 
     steps:
       - uses: actions/checkout@v2