Espressodb

This PR concludes project v1.2.1 and generates a new PyPi release.

New features & updates

1. Update the default model admin rendering class
2. Fixes a bug which crashed the app when forms provided errors caught by check consistent methods (this still does not work for m2m fields 77). **Data inserted prior this fix is not affected--this bug caused errors to be raised in a user unfriendly fashion.**
3. Allows to ignore specified apps in the migration consistency check method which may caused unittests to fail for Django version 3.1.

Merged PRs:

73, 75, 76

Resolved issues

71, 72, 74

Backwards incompatible changes

None

This PR concludes project `v1.2.0` and generates a new PyPi release.

Special thanks to kenmcelvain and cchang5 for valuable feedback which contributed to PR 70.

New features

* Navigation bar customization now possible by extending nav-blocks in templates
* More customization options for admin pages (excluding models)
* Improvements to `Base` class string rendering (children can overwrite default rendering, arguments rendered as `False` now show up in default string)
* Introduction of GitHub PR and Issue templates (partially present in master already)

And some typo fixes

Merged PRs

62, 67, 68, 69

Resolved Issues

57, 58, 59, 60, 64

Backwards incompatible changes

None

Version used for JOSS Publication.

See PR 48 for details.