shard.yml version updating automatically

[lebogan]

Here's my use case:
I have an app using some shards and the app version is in src/app/version.cr. I keep the app version up to date during development and I use a --version flag for the user. I always seem to forget to update the version in the shard.

1. Is that version number in shard.yml the same as my app version?
2. Is there a way to auto-update that number during development/refactor/bug fixing/etc?

If this constitutes a feature request, please consider.

Thank you so much for this awesome tool!

[lebogan]

Found #147 which answers my request. Thanks.