Accidentally removed Laravel 7

Author: claudiodekker

.github/workflows/tests.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: true
       matrix:
         php: [ 7.2, 7.3, 7.4, '8.0', 8.1 ]
-        laravel: [ 6, 8, 9 ]
+        laravel: [ 6, 7, 8, 9 ]
         stability: ['prefer-lowest', 'prefer-stable']
         exclude:
           - php: 7.2