Set release information

# export PREVIOUS_RELEASE=$(git describe --abbrev=0)
export PREVIOUS_RELEASE=0.3.5 # generate the full changelog since last pyhs100 release
export NEW_RELEASE=0.4.0.pre1

Update the version number

poetry version $NEW_RELEASE

Generate changelog

# gem install github_changelog_generator --pre
# https://github.com/github-changelog-generator/github-changelog-generator#github-token
export CHANGELOG_GITHUB_TOKEN=token
github_changelog_generator --base HISTORY.md --user python-kasa --project python-kasa --since-tag $PREVIOUS_RELEASE --future-release $NEW_RELEASE -o CHANGELOG.md

Write a short and understandable summary for the release.
Commit the changed files

git commit -av

Create a PR for the release.
Get it merged, fetch the upstream master

git checkout master
git fetch upstream
git rebase upstream/master

Tag the release (add short changelog as a tag commit message), push the tag to git

git tag -a $NEW_RELEASE
git push upstream $NEW_RELEASE

Upload new version to pypi

If not done already, create an API key for pypi (https://pypi.org/manage/account/token/) and configure it:

poetry config pypi-token.pypi <token>

To build & release:

poetry build
poetry publish

Click the "Draft a new release" button on github, select the new tag and copy & paste the changelog into the description.