Fix Factory

src/Data/Course.php

@@ -32,7 +32,7 @@ class Course extends Data
     ) {
     }
 
-    public static function factory(): CourseFactory
+    public static function toFactory(): CourseFactory
     {
         return CourseFactory::new();
     }

src/Data/MembershipEntry.php

@@ -39,7 +39,7 @@ class MembershipEntry extends Data
     ) {
     }
 
-    public static function factory(): MembershipEntryFactory
+    public static function toFactory(): MembershipEntryFactory
     {
         return MembershipEntryFactory::new();
     }