update composer to reference new mf2/tests repo in packagist

Author: aaronpk

composer.json

@@ -9,20 +9,14 @@
             "homepage": "http://waterpigs.co.uk"
         }
     ],
-    "repositories": [
-        {
-            "type": "vcs",
-            "url": "https://github.com/microformats/tests"
-        }
-    ],
     "bin": ["bin/fetch-mf2", "bin/parse-mf2"],
     "require": {
-        "php": ">=5.4.0",
-        "microformats/test": "@dev"
+        "php": ">=5.4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "4.8.*",
-        "phpdocumentor/phpdocumentor": "v2.8.4"
+        "phpdocumentor/phpdocumentor": "v2.8.4",
+        "mf2/tests": "@dev"
     },
     "autoload": {
         "files": ["Mf2/Parser.php"]