chore(deps): update pylint requirement from ~=2.7 to ~=2.8 (appium#600)

dependabot[bot] · web-flow · commit 18db7355a6f9 · 2021-05-12T16:26:20.000+09:00
Updates the requirements on [pylint](https://github.com/PyCQA/pylint) to permit the latest version. - [Release notes](https://github.com/PyCQA/pylint/releases) - [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog) - [Commits](pylint-dev/pylint@pylint-2.7.0...pylint-2.8.1) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/Pipfile b/Pipfile
@@ -20,7 +20,7 @@ httpretty = "~=1.0"
 python-dateutil = "~=2.8"
 mock = "~=4.0"
 
-pylint = "~=2.7"
+pylint = "~=2.8"
 astroid = "~=2.5"
 isort = "~=5.8"
 
