Remove trait tests if not supported by php's version

Author: Gianluca Arbezzano

.travis.yml

@@ -11,6 +11,7 @@ php:
 before_script:
     - composer self-update
     - composer install
+    - if [ "$TRAVIS_PHP_VERSION" = 'hhvm' ]; then export COMPOSER_PROCESS_TIMEOUT=900; fi
 
 script:
     - vendor/bin/phpunit

tests/Acceptance/TraitsTest.php

@@ -9,7 +9,7 @@ final class TraitsTest extends AcceptanceTestCase
      */
     public function itCreatesTagForTopLevelTrait()
     {
-        if (version_compare('5.4.0', PHP_VERSION, 'gte')) {
+        if (version_compare('5.4.0', PHP_VERSION, '>')) {
             $this->markTestSkipped('Traits were not introduced until 5.4');
         }
 
@@ -102,7 +102,7 @@ private function privateMethod()
      */
     public function itAddsNamespacesToTraitTags()
     {
-        if (version_compare('5.4.0', PHP_VERSION, 'gte')) {
+        if (version_compare('5.4.0', PHP_VERSION, '>')) {
             $this->markTestSkipped('Traits were not introduced until 5.4');
         }