The release process had some "Post-Release Steps" but I haven't been doing them lately. What were they?
The idea was to change the version number so that someone working on the `master` branch would see a version number reflecting what the `master` branch is. For example, if version 0.9.0 was just released, then the `master` branch would be changed to have the version number 0.10.0.dev, to indicate that it's the in-development version of 0.10.0.
My thinking now is that if someone is developing new code, then they don't need the version number to help them remember what they're doing. Moreover, if someone purposefully changes the docs to view the `master` branch docs, then they probably know what that means, and they don't need help from a version number.
