* Use Theme type everywhere
* Rename Appearance type to Theme for consistency
* Reorder headers in readme
The host don't need to pass hardcoded strings any more and instead can use the exported constant
* Remove width/height from the ".excalidraw" container so it will sized automatically.
* updated all ref calculation to ".excalidraw" instead of parent since now ".excalidraw" will get resized
* Remove props width/height as its not needed anymore.
* Resize handler is also not needed anymore.
* Position absolute canvas due to #3379 (comment)
* move css to style and remove one extra rerendering
* factor out mock logic for test
* set height, width so as to avoid unnecessary updates of regression snap
* better mock
* better type checking and omit width,height from getDefaultAppState and also restore
* revert
* default to window dimensions in constructor
* update docs
* update
* update
* tweaks
* Update return type to reflect actual signature
* add tests
* Set getDimensions as optional
* add newlines between specs
* remove redundant assertion
* move fixtures to separate files
* Add spacing
* Move tests, add cases
* Add unit tests for package/utils exportToSvg
* extract default object in test
* Move test suite to new file
