尝试支持 Laravel 7

Author: calchen

composer.json

@@ -37,7 +37,7 @@
     },
     "require-dev": {
         "php-coveralls/php-coveralls": "^2.1",
-        "orchestra/testbench": "^3.5|^4.0"
+        "orchestra/testbench": "^3.5|^4.0|^5.0"
     },
     "autoload": {
         "psr-4": {