Fix tests using old faker version

Author: David Bohn

.github/workflows/main.yml

@@ -19,6 +19,10 @@ jobs:
         include:
           - laravel: 6.*
             testbench: 4.*
+        exclude:
+          - laravel: 6.*
+            php: 7.4
+            dependency-version: prefer-lowest
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}