Merge pull request Codeception#171 from Codeception/bugfix/min-version

Set minimum required version of PHP to 5.6

Author: Naktibalda

_includes/phar.html

@@ -37,7 +37,7 @@ <h4 class="panel-title">
     <div class="panel-heading" role="tab" id="headingTwo">
       <h4 class="panel-title">
         <a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="true" aria-controls="collapseTwo">
-        Install Phar for PHP 5.x
+        Install Phar for PHP 5.6
         </a>
       </h4>
       </div>

install.html

@@ -7,7 +7,7 @@
     <div class="pull-right well">
       <h4>Requirements</h4>
       <strong>
-        <div>PHP 5.4+</div>
+        <div>PHP 5.6+</div>
         <div>CURL enabled</div>
       </strong>
     </div>