Squashed 'apollo-ios/' changes from b471acffb..d0f0a87f4

d0f0a87f4 Make dependentKeys in GraphQLResult public. (#758)

git-subtree-dir: apollo-ios
git-subtree-split: d0f0a87f49e028153839d5714901649b1eaac38a

Author: gh-action-runner

Sources/Apollo/GraphQLResult.swift

@@ -20,7 +20,9 @@ public struct GraphQLResult<Data: RootSelectionSet> {
   /// Source of data
   public let source: Source
 
-  let dependentKeys: Set<CacheKey>?
+  /// The cache keys for the fields that were included in this response. Custom ``ApolloStoreSubscriber``s can use these
+  /// keys to understand when changes to the cache would affect the result of a specific response.
+  public let dependentKeys: Set<CacheKey>?
 
   public init(
     data: Data?,