v4.5b1

Bugs:

• The emulator no longer crashes when opening the keyboard preferences panel (#701).
• Fixed an issue with the raster IRQ not being triggered in some cases (#698).
• Fixed a bug that created a faulty BAM when inserting a new blank disk (#705)

Enhancements:

• The path to the FFmpeg executable is customisable now (#718)
• Added on option to disconnect the datasette (#694)
• Added additional Rom fingerprints (#707)
• Screensaver should no longer activate when the emulator is running (#709)

Refactoring:

• Sharing more code with vAmiga.

Deprecation:

• Removed TouchBar support.
• Removed support for macOS 10.14 and earlier.