3.0.0

Updates for Swift 6 - now requires Swift 6 to build.

2.0.0

Restructure to work properly with Swift concurrency.

Split the SourceMap class into two Sendable structures SourceMap and the immutable UnpackedSourceMap.

The UnpackedSourceMap type is the new home for the map(...) method on a segment cache.

Move index validation and cross-checks to the point of assigning the segments rather than serialising the source map.

1.0.0

First release