Bump pylint from 2.8.3 to 2.9.0 (#97)

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.8.3 to 2.9.0.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/v2.8.3...v2.9.0)

---
updated-dependencies:
- dependency-name: pylint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -16,7 +16,7 @@ soupsieve = "<3.0"
 
 [tool.poetry.dev-dependencies]
 pre-commit = "1.21.0"
-pylint = "^2.8.3"
+pylint = "^2.9.0"
 pytest = ">=4.6.6"
 rope = "0.19.0"