fix(deps): update dependency symfony/console to v5 (GoogleCloudPlatform#1414)

Author: renovate-bot

endpoints/getting-started/composer.json

@@ -2,7 +2,7 @@
     "require": {
         "slim/slim": "^4.7",
         "slim/psr7": "^1.3",
-        "symfony/console": " ^3.0",
+        "symfony/console": " ^5.0",
         "google/auth": "^1.8.0"
     },
     "autoload": {