Bump pylint from 2.5.2 to 2.5.3

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.5.2 to 2.5.3.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](pylint-dev/pylint@pylint-2.5.2...pylint-2.5.3)

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

requirements_tests.txt

@@ -1,6 +1,6 @@
 asynctest==0.13.0
 flake8==3.8.3
-pylint==2.5.2
+pylint==2.5.3
 pytest==5.4.2
 pytest-timeout==1.3.4
 pytest-aiohttp==0.3.0