change arg name in autoloader function and enable PHPCS warning (#35)

Use $class_name to avoid the reserved keyword "class" and add strict
comparison for strings. With these warnings fixed we can enable warnings
in PHPCS and keep our code clean.

Author: stklcode

blacklist-updater.php

@@ -94,14 +94,14 @@
 /**
  * Plugin autoloader.
  *
- * @param string $class The classname.
+ * @param string $class_name The classname.
  */
-function blacklist_updater_autoload( $class ) {
-	if ( in_array( $class, array( 'Blacklist_Updater' ) ) ) {
+function blacklist_updater_autoload( $class_name ) {
+	if ( in_array( $class_name, array( 'Blacklist_Updater' ), true ) ) {
 		require_once sprintf(
 			'%s/inc/class-%s.php',
 			dirname( __FILE__ ),
-			strtolower( str_replace( '_', '-', $class ) )
+			strtolower( str_replace( '_', '-', $class_name ) )
 		);
 	}
 }

phpcs.xml

@@ -2,7 +2,7 @@
 <ruleset>
 	<description>Sniffs for the coding standards of the plugin</description>
 
-	<arg value="psvn"/>
+	<arg value="psv"/>
 	<arg name="colors"/>
 
 	<!-- Files to sniff -->