Bump pylint from 1.9.1 to 2.8.3

Bumps [pylint](https://github.com/PyCQA/pylint) from 1.9.1 to 2.8.3.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](pylint-dev/pylint@pylint-1.9.1...v2.8.3)

---
updated-dependencies:
- dependency-name: pylint
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements-test.txt

@@ -5,7 +5,7 @@ black==21.4b2
 codespell==1.17.1
 
 jsonschema==3.2.0
-pylint==1.9.1
+pylint==2.8.3
 coverage==5.5
 doc8==0.8.1