release v3.9.0

CHANGELOG: prepare for v3.8.0

release v3.7.0

release v3.6.0

CHANGELOG: write entry for 3.5.1

Like github.com/burrowers/garble, we now include links too.

cmd/shfmt: undo the Docker side of the version var rename

For mvdan#860, which is left open as a warning to users.

finalize changelog for v3.5.0

write changelog for v3.4.3

write changelog for v3.4.2

write changelog for v3.4.1