Bump php minimum version requirement.

.travis.yml

@@ -22,7 +22,6 @@ before_script:
   - npm --version
   - travis_retry npm install
   - phpenv config-rm xdebug.ini
-  - sh -c 'if [ $(php -r "echo PHP_MINOR_VERSION;") -le 4 ]; then echo "extension = apc.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi;'
   - echo 'session.cache_limiter = ""' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - echo 'extension="redis.so"' > ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/redis.ini
   - echo 'extension="memcache.so"' > ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/memcache.ini

lib/Alchemy/Phrasea/Setup/Requirements/OpcodeCacheRequirement.php

@@ -19,6 +19,10 @@ class OpcodeCacheRequirement extends RequirementCollection implements Requiremen
     {
         $this->setName('Opcode Cache');
 
+        if (version_compare(phpversion(), '5.5.0', '>=')) {
+            return;
+        }
+
         $this->addRecommendation(
             extension_loaded('apc') || class_exists('xcache') || class_exists('wincache'),
             'A cache opcode extension such as apc, xcache or wincache is recommended',

lib/Alchemy/Phrasea/Setup/Requirements/SystemRequirements.php

@@ -15,7 +15,7 @@ use Alchemy\Phrasea\Setup\RequirementCollection;
 
 class SystemRequirements extends RequirementCollection implements RequirementInterface
 {
-    const REQUIRED_PHP_VERSION = '5.4.0';
+    const REQUIRED_PHP_VERSION = '5.5.0';
 
     public function __construct()
     {
@@ -281,11 +281,10 @@ class SystemRequirements extends RequirementCollection implements RequirementInt
         );
 
         $accelerator =
-            (function_exists('apc_store') && ini_get('apc.enabled'))
-            ||
-            function_exists('eaccelerator_put') && ini_get('eaccelerator.enable')
-            ||
-            function_exists('xcache_set')
+            version_compare(phpversion(), '5.5.0', '>=')
+            || (function_exists('apc_store') && ini_get('apc.enabled'))
+            || function_exists('eaccelerator_put') && ini_get('eaccelerator.enable')
+            || function_exists('xcache_set')
         ;
 
         $this->addRecommendation(