Fix versioning semantics and update/fix CHANGELOG

[gnikit]

This issue is mostly a reminder to fix the versioning semantics.
Some of the last few releases do not have the prefix v which is not that big of a deal but it makes it annoying to have to search through tags (not that most people should be doing that anyway).

1. The changelog also needs to be updated to refer to these releases. At least the ones that are published on GitHub.
2. release v2.2.0 also needs a fix; drop the debugging commit and make that a new release of its own v2.2.1.
3. Then make a release for v2.2.2 which is the version currently on VS Code marketplace.
4. Keep the rest of the commits for version v2.3.0 or something

[gnikit]

I am not sure if there is a way to edit the existing GitHub releases and assign new tags at them, without messing up the order that they are listed, so it might get a bit intrusive. Hopefully only the top 4 releases are really the problem so by the end of it all should be back in the correct chronological order.

[gnikit]

use

GIT_COMMITTER_DATE="$(git show --format=%aD | head -1)" git tag -a v2.0.0 -m 2.0.0

to backdate the new tags

[gnikit]

versions done

2.0.0
2.0.2
2.1.0