v4.0.0

Breaking changes:

• loadFile and loadContents now return Aff Unit. (#40 by @nsaunders)

  Note
  Although this is technically a breaking change, existing code that discards the return value will continue to work without modification, e.g.

  _ <- loadFile -- Still works, although there is no need to explicitly discard `Unit`.

Bugfixes:

• Handling of escaped quotes (#39 by @nsaunders)
• Circular references are now short-circuited. (#41 by @nsaunders)

Other improvements:

• Unused values are no longer resolved. (#40 by @nsaunders)