Forgot to exit after printing the version. Without a TTY it would exit
anyway, but in an interactive console it hangs.

A bunch of new filters based the netaddr library. Requires installing
with the package specifier.

Silent dependabot in GitHub.

A bunch of filters that just wrap objects from the netaddr library.

After 615a59a5, you need to use
specifiers to install all of the dependencies. Use the all specifier in
tests.

A quirk of GitHub, without a target the image causes a line break.

This reverts commit babd0599.

Allow installing just some of the dependencies. Some filters won't work,
but that's expected. Dcoument the change and keep all dependencies as
required for now to not cause unexpected breakage.

Dependabot in GitHub shows a warning, but these are just used for
testing and releasing (not affecting users in any way). Still, update
and close that warning.

Useful information. I will admit I'm bragging a bit with the download
counter. I didn't believe it would have so many downloads (I'm really
excited).

Now it runs the CLI as well. Duplicates other jobs but should be easier
to debug some cases.

Had to workaround the jinja package missing in some cases (like
pre-commit) so I can import the module to get the docstring.

- Fix missing output of bats in CI.
- Output doctests to junit only in CI.

- Use templates.
- junit output for doctest and bats.

For now, until I find a secure way to sing them in GitLab.

Remove Python versions that aren't tested anymore, add those that are
tested.

Shouldn't have beem merged this way.

Also:

- Update the README.
- Test more environments (every supported CPythong and PyPy version and
CPython 2.7).