Update changelog for 2.5.0 (#154)

Update changelog for 2.4.0 (#146)

Update changelog for 2.3.0 (#138)

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

Bump to v 2.2.0

Support the main branch by default. (#23)

* Initialize git with ``main`` as the default branch.

* Use the `focal` dist on travis CI since it has git 2.28

* Update the documentation to refer to the ``main`` branch.

* Allow failure in 3.10

Closes #21