fix failing build

Author: ccostin93

plugin-gradle/src/main/java/com/iwillfailyou/inspections/InheritancefreeExtension.java

@@ -5,7 +5,7 @@
 
 import java.util.List;
 
-@SuppressWarnings("inheritancefree") // only for gradle plugin framework
+@SuppressWarnings("allfinal") // only for gradle plugin framework
 public class InheritancefreeExtension implements InspectionExtension {
     private final CommonExtension common;