Update pycodestyle requirement from <2.4.0,>=2.3.0 to >=2.3.0,<2.6.0

Updates the requirements on [pycodestyle](https://github.com/PyCQA/pycodestyle) to permit the latest version.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/master/CHANGES.txt)
- [Commits](PyCQA/pycodestyle@2.3.0...2.5.0)

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

setup.py

@@ -30,7 +30,7 @@
             "autopep8 == 1.4.0",
             "flake8 >= 3.5.0, < 3.6.0",
             "flake8-print",
-            "pycodestyle >= 2.3.0, < 2.4.0",  # To avoid incompatibility with flake
+            "pycodestyle >=2.3.0,<2.6.0",  # To avoid incompatibility with flake
             ]
         },
     packages=find_packages(),