added composer install

Author: DavertMik

.travis.yml

@@ -2,4 +2,7 @@ language: php
 
 php:
   - 5.4
-  - 5.5
+  - 5.5
+
+before_script:
+  - composer install

RoboFile.php

@@ -8,18 +8,20 @@ public function release()
         // ask for changes in this release
         $changelog = $this->taskChangelog()
             ->version($version)
-            ->askForChanges();
+            ->askForChanges()
+            ->run();
 
         // adding changelog and pushing it
-        $this->taskExec('git add CHANGELOG.md')->run();
-        $this->taskExec('git commit -m "updated changelog"')->run();
-        $this->taskExec('git push')->run();
+        $this->taskGit()
+            ->add('CHANGELOG.md')
+            ->commit('updated changelog')
+            ->push()
+            ->run();
 
         // create GitHub release
         $this->taskGitHubRelease($version)
             ->uri('Codeception/Specify')
             ->askDescription()
-            ->changes($changelog->getChanges())
             ->run();
     }