snapcraft 2.21 has been released

[Sergio Schvezov]

Hello snapcrafters!

We are pleased to announce the release of version `2.21` of snapcraft 
has been released:
https://launchpad.net/snapcraft/+milestone/2.21

Here's the list of features that you can find in this new release:

- More bash completion goodness
- `source-commit` allows specifying a revision number/hash for `source` 
entries in `parts`.

Some bugs and minor improvements have been made in this micro release as 
well.

This release has seen some contributions from outside of the snapcraft 
core team, so we want to give a shout out to these folks, here's a team 
thank you for:

- Chris Wayne
- Stéphane Graber

To get the source for this release check it out at
https://github.com/ubuntu-core/snapcraft/releases/tag/2.21

A great place to collaborate and discuss features, bugs and ideas on
snapcraft is snapcraft at lists.snapcraft.io mailing list or on Ubuntu's 
rocket chat
instance on https://rocket.ubuntu.com/channel/snapcraft

To file bugs, please go to https://bugs.launchpad.net/snapcraft/+filebug.

Happy snapcrafting!
-- Sergio and the team