Added support for dereferenced map properties (#2635)

* Added support for dereferenced properties

* Added negative test

* Update pkg/exprparser/functions_test.go

Co-authored-by: ChristopherHX <christopher.homberger@web.de>

* Update pkg/exprparser/functions_test.go

Co-authored-by: ChristopherHX <christopher.homberger@web.de>

* fix lint

---------

Co-authored-by: m1r4c <lars-github@domesjo.com>
Co-authored-by: ChristopherHX <christopher.homberger@web.de>
(cherry picked from commit 20bb25432dd8db44c689a3bc2d440a648e71b3bb)

act/exprparser/interpreter.go

@@ -233,6 +233,10 @@ func (impl *interperterImpl) evaluateObjectDeref(objectDerefNode *actionlint.Obj
 		return nil, err
 	}
 
+	_, receiverIsDeref := objectDerefNode.Receiver.(*actionlint.ArrayDerefNode)
+	if receiverIsDeref {
+		return impl.getPropertyValueDereferenced(reflect.ValueOf(left), objectDerefNode.Property)
+	}
 	return impl.getPropertyValue(reflect.ValueOf(left), objectDerefNode.Property)
 }
 
@@ -316,6 +320,34 @@ func (impl *interperterImpl) getPropertyValue(left reflect.Value, property strin
 	return nil, nil
 }
 
+func (impl *interperterImpl) getPropertyValueDereferenced(left reflect.Value, property string) (value interface{}, err error) {
+	switch left.Kind() {
+	case reflect.Ptr:
+		return impl.getPropertyValue(left, property)
+
+	case reflect.Struct:
+		return impl.getPropertyValue(left, property)
+	case reflect.Map:
+		iter := left.MapRange()
+
+		var values []interface{}
+		for iter.Next() {
+			value, err := impl.getPropertyValue(iter.Value(), property)
+			if err != nil {
+				return nil, err
+			}
+
+			values = append(values, value)
+		}
+
+		return values, nil
+	case reflect.Slice:
+		return impl.getPropertyValue(left, property)
+	}
+
+	return nil, nil
+}
+
 func (impl *interperterImpl) getMapValue(value reflect.Value) (interface{}, error) {
 	if value.Kind() == reflect.Ptr {
 		return impl.getMapValue(value.Elem())