module: update pylint version to 2.7.x

Updates the requirements on [pylint](https://github.com/PyCQA/pylint) to permit the latest version (#35).
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/pylint-2.6.0...pylint-2.7.1)

Signed-off-by: dependabot[bot] <support@github.com>

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

pyproject.toml

@@ -17,6 +17,6 @@ requests = "~2.25"
 
 [tool.poetry.dev-dependencies]
 mypy = "0.800"
-pylint = "~2.6"
+pylint = "~2.7"
 rope = "~0.18"
 yapf = "~0.30"