1. htmlcanvaselement api: toblob

2. htmlcanvaselement api: toblob: `quality` parameter

3. htmlcanvaselement api: toblob: `type` parameter supports `"image/jpeg"`

4. htmlcanvaselement api: toblob: `type` parameter supports `"image/png"`

5. htmlcanvaselement api: toblob: `type` parameter supports `"image/webp"`

6. offscreencanvas api: converttoblob

7. offscreencanvas api: converttoblob: `option.type` parameter supports `"image/webp"`