What does scout changing relationship with Calpurnia suggest about scouts coming of age?

Answer: Scout respects Calpurnia more as she grows up, and understands the purpose of her scolding.

Explanation:

Calpurnia is Finch family's housekeeper. She has looked after Jem and Scout since they were little.

When Scout goes to school, her attitude towards Calpurnia becomes different. Scout matures and realizes that Calpurnia only has good intentions. She scolds Scout for her own good. For example, she criticizes Scout for speaking about the Cunningham boy in a negative manner, but gives Scout a treat (crackling bread) the day after. This demonstrates that their relationship has changed for better.

Scout also goes to church with Calpurnia, where she has an insight into life of African American people in Maycomb. From that moment, Scout respects Calpurnia more, because she sees that Calpurnia is able to maintain a double-standard, and get along with both black and white people.