test: add pylint dependency

DifferentialOrange · DifferentialOrange · commit a33d0311672a · 2023-03-30T11:33:53.000+03:00
See [1]. 1. https://pypi.org/project/pylint/ Part of #270
diff --git a/requirements-test.txt b/requirements-test.txt
@@ -1,3 +1,4 @@
 git+https://github.com/baztian/dbapi-compliance.git@ea7cb1b4#egg=dbapi-compliance
 pyyaml==6.0
 importlib-metadata >= 1.0 ; python_version < '3.8'
+pylint
