pkl-swift 0.3.0 is released

[bioball]

pkl-swift 0.3.0 is released!

This brings support for Pkl 0.26 features, code generation improvements, and adds support for Windows.

See the changelog for a full list of changes.

Thanks to @bricklife, @krzysztofzablocki, @redryerye, @shsw228, @kasugamirai, and @Kila2 for their contributions to this release!