v2.1.0

Major changes:
- Dependencies updated, lxml in particular (with minimal changes in the code)
- Faster XPath performance using XSLT extensions by @Honesty-of-the-Cavernous-Tissue (#793)
- More deprecation warnings
- More robust code

Fixes:
- Fix node pruning raising an AttributeError in certain cases by @PLPeeters (#761)
- Refine img src url and fix table extraction bugs by @unsleepy22 (#762)
- Fix eager doctype regex matching by @UVMvmfee (#764)
- Add extract_with_metadata method and ut by @unsleepy22 (#765)
- More robust table extraction by @unsleepy22 (#767)
- Detect code in pre-tag using indicators and fix code formatting issues by @steineggerroland (#776)
- Fix tokenizer not stripping "Ideographic Full Stop" by @reinoldus (#783)
- Improve spacing in item, cell and code blocks by @unsleepy22 (#772)
- Changed code to handle potential empty string by @seanswyi (#790)
- Optimize PUNCT_TBL creation by @deedy5 (#791)
- Replace `None`s in code blocks by @crackcomm in (#797)
- Propagate no_fallback setting to fast argument by @unsleepy22 (#800)
- Fix bug #807 by @arcombe012 (#808)
- Added support to meta name image by @felipehertzer (#809)
- Preserve images when links are included by @rmarchei (#841)
- Clean fencedframe element during extraction by @eyupcanakman (#847)
- Add all Justext languages known to the detector with @cikay (#810)
- Safer lxml element init by @adbar (#856)
- Preserve links in tables when --links is enabled by @rmarchei (#858)

Maintenance:
- Update docs by @adbar (#773)
- Update README: fix /dependents links by @vbarbaresi (#785)
- Update CI pipeline by @adbar (#801)
- Update setup, fix code and tests by @adbar (#853)
- Review consistency of code, tests and docs by @adbar (#855)
- Add tests to prevent metadata bugs by @adbar (#857)
- Tests: check consistency by @adbar (#859)
- Modernize code base by @adbar (#860)
- Format the code with ruff by @adbar (#861)