Do release 4.0.0

See merge request !119

Update renovate.json

See merge request !124

Update pyproject.toml

See merge request !103

Update .dev-js/package.json

See merge request !104

Update dependency django-feed-reader to v2

See merge request !101

Update .prettierignore

See merge request !100

Update core

See merge request !98

Update .gitignore

See merge request !95

Update .prettierignore

See merge request !97

Update tox.ini

See merge request !88

Update .eslintrc.js

See merge request !83

Update .dev-js/package.json

See merge request !89

Update .gitignore

See merge request !91

Update pyproject.toml

See merge request !90

Update pyproject.toml

See merge request !86

Update tox.ini

See merge request !87