cfuture-2.0: CHANGELOG.md

# Revision history for cfuture

## 1.0 -- 2025-04-21

* First version, with a foreign library and a test suite already.

## 2.0 -- 2026-03-19

* Switched to Maybe results instead of exceptions wrapped into a Left.
* Changed type signature of forkFutureC to be similar to the others.
* Simplified the code and added more explanations to the documentation.