Merge pull request #6 from php-api-clients/dependabot/composer/squizlabs/php_codesniffer-3.4.0

[Security] Bump squizlabs/php_codesniffer from 2.7.0 to 3.4.0

Author: WyriHaximus

composer.json

@@ -12,7 +12,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^5.2.3",
-    "squizlabs/php_codesniffer": "^2.6",
+    "squizlabs/php_codesniffer": "^3.4",
     "phake/phake": "^2.3"
   },
   "autoload": {