Log Message:
tex-l3backend{,-doc}: update to 2022

 ## [2022-08-23]
 ### Changed
 - Approach to setting current color data from LaTeX2e

## [2022-08-05]
### Changed
- Add no-op backend functions for annotations with `dvisvgm`

## [2022-07-01]
#### Fixed
- Do not include PDF file to count pages on pdfTeX
- Opacity creation with `dvipdfmx`/XeTeX
- Reset opacity when no stack is available at the backend