EitherNet Files

• Fix: Deprecate old fold() functions and introduce new ones that use the underlying value rather than Success. This was an oversight in the previous implementation. Binary compatibility is preserved.
• Enhancement: Mark functions inline where possible to allow carried over context (i.e. in suspend functions, etc)
• Enhancement: Use contracts to inform the compiler about possible calls to lambdas.
• New: Add fluent onSuccess and onFailure* functional extension APIs to ApiResult.

What's Changed

• Misc extensions improvements by @ZacSweers in https://github.com/slackhq/EitherNet/pull/71

Full Changelog: https://github.com/slackhq/EitherNet/compare/1.7.0...1.8.0