Rewrite in Swift + Support SwiftPM

[jessesquires]

Let's rewrite this library in Swift ~~3.0~~ :tada:

This is a long term goal, and mostly for fun. Especially with nullability annotations, there is very little value to gain by doing this.

But, Swift is awesome™ and the future™, so it would be fun to rewrite this. Also, it's a pretty small framework so it shouldn't be too difficult or take too long.

~~:warning: Waiting for the final release of Swift 3.0 to do this.~~

Todos:

• [ ] Rewrite in Swift
• [ ] Update docs
• [ ] Update unit tests
• [ ] Update travis-ci
• [ ] Rewrite demo projects in Swift

Some notes:

• Use an enum FileType for the file types (file extensions)
• Use a struct for file names, which contains the name (String) and type (FileType)
• Singletons in Swift

⚠️ NOTE: will not accept pull requests for this issue :smile:

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Any new features we can make use of in this library?

5.1

• https://www.hackingwithswift.com/articles/182/whats-new-in-swift-5-1
• https://www.raywenderlich.com/4187396-what-s-new-in-swift-5-1

5.2

• https://swift.org/blog/swift-5-2-released/
• https://www.hackingwithswift.com/articles/212/whats-new-in-swift-5-2

[s-faychatelard]

Hey!

I did a pre-rewrite of the library in Swift (1.2 for now)

https://github.com/s-faychatelard/JSQSystemSoundPlayer-Swift

It can be a good start for you maybe

EDIT: Added a branch for Swift 2.0 support, ported unit tests and added OS X support and example