2.0.0

Breaking

• Requires Swift 6.0 (Xcode 16) or newer (swift-tools-version bumped from 5.0 to 6.0). Projects on older toolchains should stay pinned to 1.x.

Changes

• Make base32 a constant so the library compiles under Swift 6 strict concurrency (#10, thanks @nylki).
• Make the test targets' allTests constants (#11).