Squashed 'apollo-ios-codegen/' changes from 6d13bd64..3417542d

3417542d release: 1.9.1 (#280)

git-subtree-dir: apollo-ios-codegen
git-subtree-split: 3417542da2e7abb22490077a932690340a53ffe8

Sources/CodegenCLI/Constants.swift

@@ -1,6 +1,6 @@
 import Foundation
 
 public enum Constants {
-  public static let CLIVersion: String = "1.9.0"
+  public static let CLIVersion: String = "1.9.1"
   static let defaultFilePath: String = "./apollo-codegen-config.json"
 }