Remove .dev0 from version numbers during releases. (#6116)
Remove .dev0 from version numbers during releases. (#6116)

This allows us to depend on packages like acme>=0.26.0.dev0 during development
and automatically change it to acme>=0.26.0 during the release. We use `git add
-p` to be safe, but if .dev0 is used at all in our released setup.py files,
we're probably doing something wrong.
lmcro/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt,stweil/letsencrypt,stweil/letsencrypt,letsencrypt/letsencrypt