Add CHANGELOG.md (#349)

Co-authored-by: Richard Dodd <[email protected]>

CHANGELOG.md

@@ -0,0 +1,27 @@
+# Changelog
+
+<!-- Instructions
+
+This changelog follows the patterns described here: <https://keepachangelog.com/en/1.0.0/>.
+
+Subheadings to categorize changes are `added, changed, deprecated, removed, fixed, security`.
+
+-->
+
+## Unreleased
+
+### Added
+
+- [#339](https://github.com/linebender/kurbo/pull/339) - Add `From (f32, f32)` for `Point` by [@rsheeter](https://github.com/rsheeter)
+
+### Changed
+
+- [#340](https://github.com/linebender/kurbo/pull/340) - Move `Self: Sized` bound from `Shape` to methods by [@waywardmonkeys](https://github.com/waywardmonkeys)
+
+### Fixed
+
+- [#343](https://github.com/linebender/kurbo/pull/343) - Allow lines in simplify input by [@raphlinus](https://github.com/raphlinus)
+
+## 0.11.0 (2024-02-14)
+
+- ...

README.md

@@ -33,11 +33,12 @@ To learn more about Bézier curves, [A Primer on Bézier Curves] by Pomax is ind
 
 ## Contributing
 
-Contributions are welcome. The [Rust Code of Conduct] applies. Please feel free to add your name to the [AUTHORS] file in any substantive pull request.
+Contributions are welcome. The [Rust Code of Conduct] applies. Please document any changes in [CHANGELOG.md] as part of your PR, and feel free to add your name to the [AUTHORS] file in any substantive pull request.
 
 [Rust Code of Conduct]: https://www.rust-lang.org/policies/code-of-conduct
 [lyon_geom]: https://crates.io/crates/lyon_geom
 [flo_curves]: https://crates.io/crates/flo_curves
 [vek]: https://crates.io/crates/vek
 [A Primer on Bézier Curves]: https://pomax.github.io/bezierinfo/
 [AUTHORS]: ./AUTHORS
+[CHANGELOG.md]: ./CHANGELOG.md