Bump gidgethub from 5.2.1 to 5.3.0 (#59)

Bumps [gidgethub](https://github.com/brettcannon/gidgethub) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/brettcannon/gidgethub/releases)
- [Changelog](https://github.com/brettcannon/gidgethub/blob/main/docs/changelog.rst)
- [Commits](gidgethub/gidgethub@v5.2.1...v5.3.0)

---
updated-dependencies:
- dependency-name: gidgethub
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -13,7 +13,7 @@ python-dateutil = "^2.8.2"
 humanize = "^4.6.0"
 parsedatetime = "^2.6"
 aiohttp = "^3.8.4"
-gidgethub = "^5.2.1"
+gidgethub = "^5.3.0"
 "discord.py" = "^2.2.3"
 
 [tool.poetry.dev-dependencies]