Composer updates

.travis.yml

@@ -7,6 +7,7 @@ php:
   - hhvm
 
 before_script:
+  - composer self-update
   - composer install --prefer-source --no-interaction --dev
 
 script:

composer.json

@@ -13,18 +13,17 @@
         "illuminate/support": "~4.1"
     },
     "require-dev": {
-        "phpspec/phpspec": "2.0.*@dev",
-        "behat/behat": "v2.5.1",
-        "behat/mink": "v1.5.0",
-        "behat/mink-extension": "*",
-        "behat/mink-goutte-driver": "*",
-        "behat/mink-selenium2-driver": "*",
-        "phpunit/phpunit": "3.*"
+        "phpspec/phpspec": "~2.0",
+        "behat/behat": "~2.5.1",
+        "behat/mink": "~1.5.0",
+        "behat/mink-extension": "~1.2.0",
+        "behat/mink-goutte-driver": "~1.0.9",
+        "behat/mink-selenium2-driver": "~1.1.1",
+        "phpunit/phpunit": "~3.7"
     },
     "autoload": {
         "psr-0": {
             "Way\\Generators": "src/"
         }
-    },
-    "minimum-stability": "stable"
+    }
 }