Phytest

Supporting python 3.11.

Relaxing dependency versions and updating the lock file so that the dependencies are more up to date. This is making way for a release to bioconda.

What's Changed
* Additional asserts for Tree and Data by Wytamma in https://github.com/phytest-devs/phytest/pull/30

**Full Changelog**: https://github.com/phytest-devs/phytest/compare/v1.2.0...v1.3.0

Add parallel tests using pytest-xdist.

**Full Changelog**: https://github.com/phytest-devs/phytest/compare/v1.1.0...v1.2.0

Add several [Tree assert methods](https://phytest-devs.github.io/phytest/reference.html#tree) and update docs.

- assert_branch_lengths
- assert_terminal_branch_lengths
- assert_internal_branch_lengths
- assert_no_negatives
- assert_tip_names


**Full Changelog**: https://github.com/phytest-devs/phytest/compare/v1.0.1...v1.1.0

Testing coverage to 100%.
Plot of root-to-tip regression able to be added to html report.

**Full Changelog**: https://github.com/phytest-devs/phytest/compare/v1.0.0...v1.0.1