Upgrade workos-php to 4.27.0 (#62)

Author: csrbarber

composer.json

@@ -22,7 +22,7 @@
   ],
   "require": {
     "php": ">=5.6.0",
-    "workos/workos-php": "^v4.26.0"
+    "workos/workos-php": "^v4.27.0"
   },
   "require-dev": {
     "friendsofphp/php-cs-fixer": "^2.15 || ^3.6",