Gaplint

Fix the last release by correcting the `long_description`.

Fix the last release by actually increasing the version number.

What's Changed

In this release there are lots of internal changes and improvements, and 10 new rules added.

* Add dont-use-arg rule by james-d-mitchell in https://github.com/james-d-mitchell/gaplint/pull/26


**Full Changelog**: https://github.com/james-d-mitchell/gaplint/compare/v1.2.1...v1.3.0

What's Changed
* Don't add command line args if running in pytest by james-d-mitchell in https://github.com/james-d-mitchell/gaplint/pull/37


**Full Changelog**: https://github.com/james-d-mitchell/gaplint/compare/v1.2.0...v1.2.1

What's Changed

* Add rules `W033` to `W039` see `README.rst` for more details.
* Update setup.cfg to use _ and not - by james-d-mitchell in https://github.com/james-d-mitchell/gaplint/pull/32
* Fix failing test in release archive by james-d-mitchell in https://github.com/james-d-mitchell/gaplint/pull/33
* Don't add command line args if not run as script by james-d-mitchell in https://github.com/james-d-mitchell/gaplint/pull/34

**Full Changelog**: https://github.com/james-d-mitchell/gaplint/compare/v1.1.5...v1.2.0

This is a minor release fix a bug in the detection of `gaplint.yml` files, reported in:

https://github.com/gap-system/gap/issues/5316
https://github.com/gap-system/gap/issues/5321