Merge pull request #162 from wpengine/PI-666

Update CodeSniffer version to 2.8.1

Author: octalmage

composer.json

@@ -7,7 +7,7 @@
 		"email": "[email protected]"
 	}],
 	"require": {
-		"squizlabs/php_codesniffer": "2.6.*",
+		"squizlabs/php_codesniffer": "2.8.*",
 		"wimg/php-compatibility": "dev-master",
 		"simplyadmire/composer-plugins" : "@dev"
 	},