Drop php7 from github actions

Author: usox

.github/workflows/php.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest']
-        php-versions: [7.4, 8.0]
+        php-versions: [8.0]
     steps:
       - uses: actions/checkout@v2