Update CodeSniffer

Author: felixfbecker

Diff for: composer.json

@@ -31,7 +31,7 @@
         "phpdocumentor/reflection-docblock": "^3.0",
         "sabre/event": "^5.0",
         "felixfbecker/advanced-json-rpc": "^2.0",
-        "squizlabs/php_codesniffer" : "3.0.0RC3",
+        "squizlabs/php_codesniffer" : "^3.0",
         "netresearch/jsonmapper": "^1.0",
         "webmozart/path-util": "^2.3",
         "webmozart/glob": "^4.1",
@@ -49,7 +49,8 @@
         "files" : [
             "src/utils.php",
             "src/FqnUtilities.php",
-            "src/ParserHelpers.php"
+            "src/ParserHelpers.php",
+            "vendor/squizlabs/php_codesniffer/autoload.php"
         ]
     },
     "autoload-dev": {