Create a new release on Pypi to include new changes

[antoinedelia]

Hi,

The last release 1.3.0 is from 30 April 2021. Since then, many new features were added (such as the get_or_instantiate() method).

It would be nice to make a new release to include these changes. This would also mean updating the CHANGELOG.md file.

Thanks.

[glennmatthews]

Agreed completely, thanks for raising this. I think we'd ideally like to merge or close #87 and then cut a new release immediately afterwards.

[dgarros]

1.4.0 has been released