Upgrade pylint to 2.3.0 (#200)

Author: fabaff

setup.py

@@ -120,7 +120,7 @@ def get_git_commit_datetime() -> str:
     'mock-open==1.3.1',
     'mypy==0.670',
     'pydocstyle==2.1.1',
-    'pylint==2.2.2',
+    'pylint==2.3.0',
     'pytest-cov==2.6.1',
     'pytest-sugar==0.9.2',
     'pytest-timeout==1.3.3',