Release 0.6.8 (#3165)

The purpose of this release is to add support for the `--vscode` flag,
required by an update to the juvix vscode extension.

* #3162
* anoma/vscode-juvix#153

This PR updates:

- [x] Package version
- [x] Smoke test

The CHANGELOG generator we use:
https://github.com/github-changelog-generator/github-changelog-generator
has stopped working with errors like the following:

```
Warning: PR 3148 merge commit was not found in the release branch or tagged git history and no rebased SHA comment was found
```

So we'll defer populating the CHANGELOG summary until after the release.

Release 0.6.7 (#3153)

This PR updates:

- [x] Package version
- [x] Smoke test

The CHANGELOG generator we use:
https://github.com/github-changelog-generator/github-changelog-generator
has stopped working with errors like the following:

```
Warning: PR 3148 merge commit was not found in the release branch or tagged git history and no rebased SHA comment was found
```

So we'll defer populating the CHANGELOG summary until after the release

Release 0.6.6 (#2993)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

Release 0.6.5 (#2956)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

We can't merge this until the stdlib submodule pointer is fixed-up to
point to stdlib main.

Release 0.6.4 (#2910)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

Release 0.6.3 (#2870)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

Update CHANGELOG for 0.6.2 (#2824)

I didn't release 0.6.2 last week, but we can do it now. I've updated the
CHANGELOG with the work we did last week.

Other release changes for 0.6.2 were done in
#2795

Release 0.6.1 (#2699)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

Release v0.6.0 (#2676)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

Bump up version to v0.5.5 (#2547)

This PR updates:

- [x] Package version
- [x] Smoke test
- [x] Changelog

---------

Co-authored-by: Paul Cadman <[email protected]>