v0.4.0

What's Changed

• upgrade ete3 -> ete4. Several function which returns PhyloTree objects return now
  ete4 Trees. Be aware that the API for ete3 and ete4 differs and may break your
  code.

• upgrade of numpy 1.26 to 2.0

• added several new tests

Full Changelog: v0.3.2...v0.4.0