Changed ClassStructureSniff settings in phpcs.xml

Author: kukulich

build/phpcs.xml

@@ -51,8 +51,8 @@
 				<element value="protected static properties"/>
 				<element value="private properties"/>
 				<element value="private static properties"/>
-				<element value="public abstract methods"/>
-				<element value="protected abstract methods"/>
+				<element value="public abstract methods, public static abstract methods"/>
+				<element value="protected abstract methods, protected abstract methods"/>
 				<element value="constructor"/>
 				<element value="public methods"/>
 				<element value="public static methods"/>