Swift 5.7 compability for the GryphonSwiftLibrary

[tfmart]

What's in this pull request?

This pull request includes the necessary changes that enabled the Gryphon package to be built with Swift 5.7/Xcode 14. These changes have been discussed at #117

I've also tested with the Release Candidate version of Xcode 14, release on September 7th

Does this resolve an open issue?

It partially resolvers #117. It fixed the build erros the project were having on newer Xcode versions, but it doesn't fix the translation script issues

Checklist for submitting a pull request:

• [x] Your code builds without any errors or warnings (warnings when running prepareForBootstrapTests.sh are OK).
• [ ] You ran the unit tests and Bootstrapping tests for your platform.
  • [ ] If you changed any .kt files in the Test cases folder, you also ran the Acceptance tests.
• [ ] You have added new tests that check your changes (if possible).
• [x] This pull request is targeting the development branch (if you're contributing code) or the gh-pages branch (if you're contributing to the website).

[vinivendra]

Hey @tfmart, just downloaded Xcode 14.2 to test this and it seems to be working fine. Merging it into the development branch.