Release 0.5.2

[utensil]

This release is a maintenance release with no functionality changes, includes only some updates to README:

• citation info (716617a...4607cda)
• star history
• contributors

This also fixes the issue that zenodo can't correctly refer to v0.5.1 due to how I messed up with releasing 0.5.1:

I created release 0.5.1rc2 but the version number in _version.py is 0.5.1 so pypi release 0.5.1 and I can't release 0.5.1 again after that, so I modified the release on Github, but zenodo can only point to 0.5.1rc2.

Another things that I have messed up is that I forgot to use squash merge during 0.5.1 and 0.5.2. Since 0.6.0, this practice would be resumed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.05%. Comparing base (4607cda) to head (64570f6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #517   +/-   ##
=======================================
  Coverage   78.05%   78.05%           
=======================================
  Files          17       17           
  Lines        4196     4196           
=======================================
  Hits         3275     3275           
  Misses        921      921           

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[utensil]

From now on, the release practice should be:

1. create the rc tag / pre-release on the branch with bumping only the version to a rc one
2. checks whether versions on https://pypi.org/project/galgebra/#history and https://zenodo.org/badge/latestdoi/113447311 are
3. bump to the actual release version, squash merge
4. create the actual release tag on master.