Laravel 5.5.44にアップデート

ついでにcomposer.jsonをlaravel/laravel:5.5の現状に合わせた

composer.json

@@ -6,6 +6,7 @@
     "type": "project",
     "require": {
         "php": ">=7.0.0",
+        "fideloper/proxy": "~3.3",
         "guzzlehttp/guzzle": "^6.3",
         "laravel/framework": "5.5.*",
         "laravel/tinker": "~1.0",
@@ -16,7 +17,8 @@
         "filp/whoops": "~2.0",
         "fzaninotto/faker": "~1.4",
         "mockery/mockery": "~1.0",
-        "phpunit/phpunit": "~6.0"
+        "phpunit/phpunit": "~6.0",
+        "symfony/thanks": "^1.0"
     },
     "autoload": {
         "classmap": [