message: Change xcode capitalization
diff: - `apollo-codegen-swift`
  - Replace instanceof checks with their respective predicates [#1518](https://github.com/apollographql/apollo-tooling/pull/1518)
  - Ensure types and strings are properly escaped in all generated code [#1515](https://github.com/apollographql/apollo-tooling/pull/1515)
  - - Fix warning in xcode 11 when enums have a none case [#1482](https://github.com/apollographql/apollo-tooling/pull/1482)
  + - Fix warning in Xcode 11 when enums have a none case [#1482](https://github.com/apollographql/apollo-tooling/pull/1482)
  - `apollo-codegen-typescript`
  - Replace instanceof checks with their respective predicates [#1518](https://github.com/apollographql/apollo-tooling/pull/1518)
  - `apollo-env`
  