v0.9.4

[0.9.4] - 2021-05-16

PyPI: https://pypi.org/project/atdict/0.9.4/

Changs from the previous release: (diff)

• moved from Travis CI to GitHub Actions
• changed the default branch to "main"
• added tests on Python 3.8, 3.9
• removed tests on Python 2.7