Release checklist

With flatgeobuf as test requirement we have a circular dependency on geozero, which causes build conflicts when doing major version updates.

geozero

Make sure GitHub CI status is green.
Make sure local branch is up-to-date (git pull --rebase)
cd geozero
Check for compatible major updates with cargo outdated
Bump version in Cargo.toml
Set release date in CHANGELOG.md
git commit -a -m "Release geozero x.x.x"
cargo publish (possibly cargo publish --no-verify)
git tag -m v0.x.x v0.x.x
Bump to next minor version in Cargo.toml (without -dev postfix)
git commit -a -m "Bump version"

Major updates:

Create branch of flatgeobuf with updated geozero dependency
Change flatgeobuf to git version until flatgeobuf crate is released