Temporarily use development version of fsi/files

Author: chives

composer.json

@@ -22,6 +22,10 @@
         {
             "type": "git",
             "url": "https://github.com/fsi-open/phpspec.git"
+        },
+        {
+            "type": "git",
+            "url": "https://github.com/chives/files.git"
         }
     ],
     "require": {
@@ -63,7 +67,7 @@
         "friends-of-behat/mink-extension": "^2.6",
         "friends-of-behat/page-object-extension": "^0.3.2",
         "friends-of-behat/symfony-extension": "^2.3",
-        "fsi/files": "^2.0.4|^3.0@dev",
+        "fsi/files": "dev-dev as 3.0",
         "fsi/resource-repository-bundle": "^3.0.3@dev",
         "gedmo/doctrine-extensions": "^3.13",
         "mockery/mockery": "^1.6",