Add change log entries for v2.20 release

[decentral1se]

This is a bit painful and unfortunate that we've been missing the entries.

We should add entries for user facing changes for the next release.

See https://github.com/ansible/molecule/projects/2 for more.

[webknjaz]

How about using towncrier or reno for that?

[decentral1se]

I really like the look of towncrier! Any reasons to chose one over the other? I'm open!

Here's the user facing changes/fixes/etc. that I see from https://github.com/ansible/molecule/projects/2:

• Added buildargs to docker_image in create.yml #1606
• Add ability to call molecule as a python module #1545
• Fix some broken links #1538
• Tidy up more docs #1536
• Fix all links #1720
• Travis packaging and automation #1593
• Use --parallel` in Tox documentation instead of Detox. #1683
• Update SHA-256 hash for the goss verifier binary #1555
• sort scenarios based on directory name #1640
• fix #1634 - remove unnecessary packages from pip packages list in Dockerfile #1635
• Remove sudo pip ... #1685
• Remove bad test docs and fix typo. #1684
• Fixing #1488: Add feature to connect to windows host using delegated driver via winrm connection #1674
• Use "" instead of '' to be able to invoke pwd #1728
• Don't truncate error log and disable line length checks #1717
• Explicitly call out commonly needed fields to run systemd in docker #1703
• Add Linode driver (v3 API) #1458
• Move https://github.com/retr0h/cookiecutter-molecule #1747
• Add override_command command to platforms definition #1771
• Assures that author is listed on PYPI #1765
• Add cleanup step. #1676

I probably missed some and there have been looaaddsss more work done on internals of project maintenance! I probably won't have time to compile this today into the CHANGELOG.md but will later in the week. Hoping to see movement on a pre-release today if not this week! 👍

[webknjaz]

@decentral1se you can do a pre-release v2.20a0 and then release a follow-up pre-release v2.20a0.post0 as soon as you're done with changelog. It should be that flexible.

P.S. See https://www.python.org/dev/peps/pep-0440/#post-releases for chaining sub-release versions details

[webknjaz]

Regarding automation.

I've got several projects using towncrier and it's very easy to use, yet it's got some limitations (I think it's one-lined markdown so it's usually one sentence, IIRC).

Ansible uses reno. It's way more complicated. Users have to add YAML files with proper keys instead of adding just files with extensions and text. It's also challenging to integrate, I was trying to do it for virtualenv or tox (I don't remember) a while back but failed, which feels discoraging. OTOH, Ansible has a wrapper script for running log generation.
It is an OpenStack project and seamlessly integrates with pbr and SphinX.

So I vote for towncrier as it's simpler. Unless anyone has other opinions, I'd like to avoid reno. Otherwise, somebody else will have to figure out the integration part.

[decentral1se]

TODO #1797 (comment)

[decentral1se]

RE: automation, see #1779 (comment).

We'll compile this manually for v2.20 👍

See latest WG logs.

[decentral1se]

Taken a stab at this in #1816!