Update .travis.yml

.travis.yml

@@ -47,7 +47,7 @@ install:
   - php artisan admin:publish --force
   - php artisan admin:install
   - php artisan migrate:rollback
-#  - php artisan dusk:chrome-driver 83
+  - php artisan dusk:chrome-driver 73
 #  - php artisan dusk:update 79
   - cp -f ./tests/routes.php ./app/Admin/
   - cp -rf ./tests/resources/config ./config/