Img2table

What's Changed
* Migrate PDF library to pypdfium2 for licence compliance

**Full Changelog**: https://github.com/xavctn/img2table/compare/1.3.1...1.4.0

What's Changed
* Fix bugs by xavctn in https://github.com/xavctn/img2table/pull/230


**Full Changelog**: https://github.com/xavctn/img2table/compare/1.3.0...1.3.1

Features
- Complete overhaul of the line detection algorithm to improve detection of lines defined by background color changes
- Improvement in detection of semi-bordered cells
- Update detection of rows in borderless tables
- Add support for Surya OCR
- Add detection of implicit columns via the <code>implicit_columns</code> parameter
- Optimization of code performance via numba refactoring
- Update of examples notebooks
Bug fixes
- Fix bug with text position when extracting text from rotated PDFs

* Simpler and more consistent line detection
* Detection of discontinuous columns in borderless tables

- Fix miscellaneous code left from legacy processing
- Add margin to top/bottom of borderless tables

What's Changed
* Update metrics computation and borderless table detection
* Add compatibility with Python 3.12
* Add support for documents with black backgrounds