Merge pull request #25 from exPHAT/enhanced_platform_support

Remove if-let without an assignment for Swift 5.6 compatability

Update whisper.cpp to latest version, use new progress callback

Fix unmanaged self retain missing corrisponding release (caused memor…

…y leak)

Update fast commit hash

Switch back to for tests until Xcode 14.3 is available via Github Act…

…ions