Update Laravel.gitignore

Ignore Homestead related config files

Laravel.gitignore

@@ -10,6 +10,8 @@ bootstrap/cache/
 .env.*.php
 .env.php
 .env
+Homestead.yaml
+Homestead.json
 
 # Rocketeer PHP task runner and deployment package. https://github.com/rocketeers/rocketeer
 .rocketeer/