Changed Yii2 stable to 2.0.8;

Author: edgardmessias

README.md

@@ -1,14 +1,16 @@
 Firebird Extension for Yii 2
 ==========================
 
+This branch use last stable version of Yii2 (2.0.8)
+
 This extension adds [Firebird](http://www.firebirdsql.org/) database engine extension for the [Yii framework 2.0](http://www.yiiframework.com).
 
 [![Yii2](https://img.shields.io/badge/Powered_by-Yii_Framework-green.svg?style=flat)](http://www.yiiframework.com/)
-[![Build Status](https://travis-ci.org/edgardmessias/yii2-firebird.svg?branch=master)](https://travis-ci.org/edgardmessias/yii2-firebird)
-[![Dependency Status](https://www.versioneye.com/php/edgardmessias:yii2-firebird/dev-master/badge.png)](https://www.versioneye.com/php/edgardmessias:yii2-firebird/dev-master)
+[![Build Status](https://travis-ci.org/edgardmessias/yii2-firebird.svg?branch=yii2-stable)](https://travis-ci.org/edgardmessias/yii2-firebird)
+[![Dependency Status](https://www.versioneye.com/php/edgardmessias:yii2-firebird/dev-yii2-stable/badge.png)](https://www.versioneye.com/php/edgardmessias:yii2-firebird/dev-yii2-stable)
 [![Reference Status](https://www.versioneye.com/php/edgardmessias:yii2-firebird/reference_badge.svg)](https://www.versioneye.com/php/edgardmessias:yii2-firebird/references)
-[![Code Coverage](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/?branch=master)
-[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/?branch=master)
+[![Code Coverage](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/badges/coverage.png?b=yii2-stable)](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/?branch=yii2-stable)
+[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/badges/quality-score.png?b=yii2-stable)](https://scrutinizer-ci.com/g/edgardmessias/yii2-firebird/?branch=yii2-stable)
 
 Requirements
 ------------

composer.json

@@ -18,12 +18,12 @@
         }
     ],
     "require": {
-        "yiisoft/yii2": "~2.0.7",
+        "yiisoft/yii2": "~2.0.8",
         "ext-pdo": "*",
         "ext-pdo_firebird": "*"
     },
     "require-dev": {
-        "yiisoft/yii2-dev": "2.0.x-dev",
+        "yiisoft/yii2-dev": "2.0.8",
         "phpunit/phpunit": "~4.4"
     },
     "autoload": {