refactored extension to support latest changes in Behat edge

src/Behat/MinkExtension/Context/ClassGuesser/MinkContextClassGuesser.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Behat\MinkExtension\Context\ClassGuesser;
+
+use Behat\Behat\Context\ClassGuesser\ClassGuesserInterface;
+
+/**
+ * Mink context class guesser.
+ * Provides Mink context class if no other class found.
+ */
+class MinkContextClassGuesser implements ClassGuesserInterface
+{
+    /**
+     * Tries to guess context classname.
+     *
+     * @return string
+     */
+    public function guess()
+    {
+        return 'Behat\\MinkExtension\\Context\\MinkContext';
+    }
+}