Squashed 'apollo-ios/' changes from e98e9d3b..129c16a1

129c16a1 fix: InputObject GraphQLNullable subscript (#596)

git-subtree-dir: apollo-ios
git-subtree-split: 129c16a14210168665ea5f41e8060f8528f99cdd

Author: gh-action-runner

Sources/ApolloAPI/SchemaTypes/InputObject.swift

@@ -30,11 +30,23 @@ public struct InputDict: GraphQLOperationVariableValue, Hashable {
 
   public var _jsonEncodableValue: (any JSONEncodable)? { data._jsonEncodableObject }
 
+  @_disfavoredOverload
   public subscript<T: GraphQLOperationVariableValue>(key: String) -> T {
     get { data[key] as! T }
     set { data[key] = newValue }
   }
 
+  public subscript<T: GraphQLOperationVariableValue>(key: String) -> GraphQLNullable<T> {
+    get {
+      if let value = data[key] {
+        return value as! GraphQLNullable<T>
+      }
+
+      return .none
+    }
+    set { data[key] = newValue }
+  }
+
   public static func == (lhs: InputDict, rhs: InputDict) -> Bool {
     lhs.data._jsonEncodableValue?._jsonValue == rhs.data._jsonEncodableValue?._jsonValue
   }