use latest DeviceDetector release (2.0)

composer.json

@@ -25,7 +25,7 @@
         "symfony/console": ">=v2.3.5",
         "tedivm/jshrink": "v0.5.1",
         "mustangostang/spyc": "0.5.*",
-        "piwik/device-detector": "dev-master"
+        "piwik/device-detector": "2.*"
     },
     "require-dev": {
         "phpunit/phpunit": "4.*"

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "8432cff50123bf1d2eaf0c1a56b0b72f",
+    "hash": "4608e7a637e41e4ba55deba353d4765d",
     "packages": [
         {
             "name": "leafo/lessphp",
@@ -96,7 +96,7 @@
         },
         {
             "name": "piwik/device-detector",
-            "version": "dev-master",
+            "version": "2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/piwik/device-detector.git",
@@ -996,9 +996,9 @@
 
     ],
     "minimum-stability": "stable",
-    "stability-flags": {
-        "piwik/device-detector": 20
-    },
+    "stability-flags": [
+
+    ],
     "platform": {
         "php": ">=5.3.2"
     },