Su6

Feature

* **plugin:** Change command registration system and allow config; coverage is still
low ([`1124a9c`](https://github.com/trialandsuccess/su6/commit/1124a9cbf5a2deb5b451b06bed8169874560f162))
* **plugin:** WIP to add plugin-specific
config ([`24c2456`](https://github.com/trialandsuccess/su6/commit/24c2456bf2fc2bd5aeb7602467aadfb0d9241b92))

Documentation

* **badge:** Pinned su6 checks gh action badge to specific branch instead of latest
check ([`a4e525b`](https://github.com/trialandsuccess/su6/commit/a4e525be4477319c2bfad7eb9864241fadfdf7f9))

Feature

* **plugins:** Allow third party
plugins ([`5ba672a`](https://github.com/trialandsuccess/su6/commit/5ba672a40b893488dd593c88ed5ea9245cc66d95))

Fix

* **plugins:** Expose run_tool externally for use in
plugins ([`9c05af0`](https://github.com/trialandsuccess/su6/commit/9c05af035a309a9205d96b7038f203d40f500097))
* **plugins:** Proper mypy return
types ([`a3f2f2e`](https://github.com/trialandsuccess/su6/commit/a3f2f2ecb0a5cdb717582d7dd28b2c64b9f3e913))

Documentation

* **plugins:** Show usage example of making a
checker ([`b02e981`](https://github.com/trialandsuccess/su6/commit/b02e981fc112795e90a59d5ee6dc7ddfa6f63ed5))

Feature

* **all:** Add `stop-after-first-failure` flag to `all` and pyproject
toml ([`906678a`](https://github.com/trialandsuccess/su6/commit/906678a344aa68a2ef2101f9765dc1e601d5d5dd))
* **config:** 'include' can now also specify the order of checks to run in '
all' ([`6f9123b`](https://github.com/trialandsuccess/su6/commit/6f9123b1869c15342bbc7e4d7cfb39f2fbb181bb))

Documentation

* **README:** Better example for gh
actions ([`73fa545`](https://github.com/trialandsuccess/su6/commit/73fa5451ec0b0c7897eaa505c931f3af991a3a5d))

Feature

* **su6:** Add --version and
self-update ([`084cd51`](https://github.com/trialandsuccess/su6/commit/084cd51b066d8d055b62556567b02e8e0a39c5fe))

Fix

* **mypy:** Ensure config.badge is a string/path, not a
bool ([`2c29b57`](https://github.com/trialandsuccess/su6/commit/2c29b57a3c0502a7377941f0b48bc569aacc5d63))