Update mink dev requirement to allow sf4

sanpii · sanpii · commit da2304e7a0e0 · 2018-01-17T15:42:20.000+01:00
diff --git a/tests/composer.json b/tests/composer.json
@@ -13,6 +13,8 @@
     "require-dev": {
         "behatch/contexts": "~2.7|~3.0",
         "behat/mink-extension": "~2.2",
+        "behat/mink": "*@dev",
+        "behat/mink-browserkit-driver": "*@dev",
         "behat/mink-goutte-driver": "*"
     },
     "autoload": {
