Add UnliftIO variant

[parsonsmatt]

This PR adds a variant of the API that uses MonadUnliftIO instead of MonadCatch and MonadThrow. Mostly because that's how we roll at work.

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• Bumped the version number.
• Documented new APIs with Haddock markup.
• Added @since declarations to the Haddock.
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After submitting your PR:

• Update the Changelog.md file with a link to your PR.
• Check that CI passes (or if it fails, for reasons unrelated to your change, like CI timeouts).

[parsonsmatt]

lmao

[parsonsmatt]

s i g h

[parsonsmatt]

b o r i n g