Update to Oxipng 9 (#13)

* Update to oxipng 9

Update and remove several options, add new scale_16 option

* Update type defintions and tests

* Update README

* v9.0.0

* Improved type definitions

* Refactor chunk conversion implementation

Extract str -> chunk conversion into dedicated function

* Refactor arg parsing implementation

Drops support for noop optimize

* Add support for RawImage

* Raise value error if Raw indexed palette is too small or too big

* RawImage tests

* Update type defintions

* Refactored README

* Additional CHANGELOG entries for v9

* Add missing test data file

* Added docstrings to typings file

Author: nfrasser

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 9.0.0
+
+- Update to oxipng 9
+- BREAKING: Removed `backup` option
+- BREAKING: Removed `check` option
+- BREAKING: Removed `pretend` option
+- BREAKING: Removed `preserve_attrs` option
+- BREAKING: Replaced `oxipng.Headers` with `oxipng.StripChunks`
+- Added: `RawImage` class for optimizing raw RGBA data
+- Added: `scale_16` option
+- Fixed: correct `fast_evaluation` option implementation
+
 ## 8.0.1
 
 - Python 3.12 wheels