bump php to 7

Author: Mte90

codeat.xml

@@ -88,8 +88,8 @@
       <exclude name="PHPCompatibility.PHP.EmptyNonVariable.Found" />
       <exclude name="PHPCompatibility.PHP.NewClosure.Found" />
    </rule>
-   <!-- Check for cross-version support for PHP 5.3 and higher. -->
-   <config name="testVersion" value="5.6" />
+   <!-- Check for cross-version support for PHP 7.0 and higher. -->
+   <config name="testVersion" value="7.0" />
    <rule ref="WordPress">
       <exclude name="Generic.Files.LineEndings.InvalidEOLChar" />
       <exclude name="Generic.Commenting.DocComment.MissingShort" />