Update pylint requirement from ~=2.6.0 to ~=2.7.2

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-2.6.0...pylint-2.7.2)

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

Author: dependabot[bot]

requirements.txt

@@ -9,6 +9,6 @@ flask_sqlalchemy~=2.4.4
 gunicorn~=20.0.4
 onesignal-sdk~=1.0.0
 psycopg2-binary~=2.8.6
-pylint~=2.6.0
+pylint~=2.7.2
 pylint-quotes~=0.2.1
 sentry-sdk~=1.0.0