Add more runners

[tgymnich]

• bump swift to 6.3
• add arm linux runners
• add windows runner
• add wasm runner

[rgoldberg]

Was bumping the SwiftPM swift-tools-version to 6.3 necessary? I didn't see any changes to Swift code.

You can still build with Swift 6.3 (or newer) with a lower swift-tools-version.

Thanks for the library.

[tgymnich]

@rgoldberg I plan on switching from XCTest to Swift Testing in the near future which requires Swift 6. Swift 5 users can use v5.x.x of BigInt and currently only miss out on one WASM specific fix.

[rgoldberg]

Thanks for the info (I, too, use & enjoy Swift Testing, but am on Swift tools 6.2).

Can you use require minimum of swift tools 6.2, 6.1, or 6.0 instead of 6.3? That would allow macOS 15.6+, 15.2+ & 14.5+, respectively, (instead of Swift 6.3's macOS 26.2+) to build using Xcode instead of needing to use Swiftly or some other Swift installation method (also, the Homebrew Core swift formula supports only through Swift 6.2.4).

If you need some Swift Testing 6.3 features in only a few places, maybe you could gate them behind @available.

If it's too much hassle, then, of course, just bump everything to 6.3, but, if it isn't difficult to use an older minimum Swift tools, I think it would allow more people to use the BigInt 6+ more easily.

Thanks for discussing & any consideration of lowering the minimum Swift tools version.

Good luck with your Swift Testing & other Swift 6 updates.

EDIT: Funnily enough, the Homebrew Core swift formula was just bumped from 6.2.4 to 6.3.2 nine hours ago, so that now facilitates using Swift 6.3 three months after Swift 6.3 was first released.

[tgymnich]

@rgoldberg I'll go back down to a more reasonable swift 6.0 in #134