chore(deps): update dependency kelvinmo/simplejwt to ^0.4.0 (GoogleCloudPlatform#1153)

Author: renovate-bot

iap/composer.json

@@ -3,7 +3,7 @@
         "symfony/console": "^2.8",
         "google/auth":"^1.8.0",
         "guzzlehttp/guzzle": "~6.5.0",
-        "kelvinmo/simplejwt": "^0.3.0"
+        "kelvinmo/simplejwt": "^0.4.0"
     },
     "autoload": {
         "psr-4": {