Add support for laravel 7 testing

Author: leganz

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: true
       matrix:
         php: [7.4]
-        laravel: [^8.0]
+        laravel: [^7.0|^8.0]
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }}