add an option to apply @GraphqlDeprecate also on classes and fields

Author: foo

src/main/java/graphql/annotations/annotationTypes/GraphQLDeprecate.java

@@ -19,7 +19,7 @@
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
-@Target(ElementType.METHOD)
+@Target({ElementType.TYPE, ElementType.METHOD, ElementType.FIELD})
 @Retention(RetentionPolicy.RUNTIME)
 public @interface GraphQLDeprecate {
     String value() default "";