Updated changelog for Canvas/TextureCreator change

changelog.md

@@ -3,6 +3,33 @@ when upgrading from a version of rust-sdl2 to another.
 
 ### v0.30
 
+[PR #632](https://github.com/AngryLawyer/rust-sdl2/pull/632)
+
+The path of soundness isn't an easy one; sometimes ease of use has to be sacrificed
+for soundness and safety! This change is a breaking change, and a **huge** one at that.
+
+**You will probably have to refactor some parts of your code**, but this is the price to
+pay for soundness and runtime safety.
+
+**Breaking Changes:**
+
+* `Renderer` has been renamed and split into `Canvas` and `TextureCreator`.
+* `Canvas` can store a `Surface` or a `Window`, and can be used to render into these as well.
+`TextureCreator` creates `Texture`s and is used by Texture to make sure they don't live
+longer than expected.
+* `set_render_target` has been removed and has been replaced with `Canvas::with_target`.
+* Deleted `WindowRef`, it wasn't useful anymore.
+
+Other Changes:
+
+* Added `PixelFormatEnum::supports_alpha(&self) -> bool` method.
+* A single Game Of Life example has been added to show the basic capabilities of the new `Canvas`
+and `TextureCreator` structs, as well as adding a very basic game to show how to handle input / game
+changes in a basic game.
+
+You won't have to worry about what target your `Renderer` has at runtime anymore, everything
+is done at compile time now !
+
 [PR #628](https://github.com/AngryLawyer/rust-sdl2/pull/628)
 
 * Changed signature of `Surface::fill_rects` ([old](https://docs.rs/sdl2/0.29.1/sdl2/surface/struct.SurfaceRef.html#method.fill_rects) | [new](https://docs.rs/sdl2/0.30.0/sdl2/surface/struct.SurfaceRef.html#method.fill_rects))
@@ -24,7 +51,7 @@ sdl2::hint::get_video_minimize_on_focus_lost() -> bool;
 
 [PR #629](https://github.com/AngryLawyer/rust-sdl2/pull/629)
 
-* Breaking: Changed Color to be a struct rather than an enum.
+* **Breaking Change: Changed Color to be a struct rather than an enum.**
 * Takes less space, easier to use, old constructors are still available.
 * Matching is no longer necessary to read the component values.
 * Struct rather than variant construction is required in static initializers.