Please specify what version of the library you are using: [ 2.0.13 ]
Please specify what version(s) of SharePoint you are targeting: [ tenant.sharepoint.com ]
It would be awesome if releases of this package were git tagged so that people can watch Github releases to be notified of new versions:

When new releases are made, there's currently no way I'm aware of to get notifications about it, apart manually watching the CHANGELOG file.
N/A
We don't currently use github releases, would tagging have any effect? You can also follow @m365pnpjs on twitter where we announce the monthly releases.
Yeah, tags are also triggering notifications nowadays.
e.g

Right on, we'll see about adding tagging to the publish script. Haven't looked at the command in a bit so might add in 2.1.0 which is becoming a big maintenance release for a lot of behind the scenes stuff. If not that one, will try for the next.
Looking at https://github.com/pnp/pnpjs/blob/version-2/tools/publish/publish-win.bat#L32, the npm version patch command that is used already git tags the version, so the only thing that seems missing is a git push --tags.
See https://git-scm.com/book/en/v2/Git-Basics-Tagging#_sharing_tags
Submitted #1485
Awesome - thanks! We'll have a look and should have it for the next release. Appreciate the help, cheers.