build(deps-dev): bump twine from 3.3.0 to 3.4.1

Bumps [twine](https://github.com/pypa/twine) from 3.3.0 to 3.4.1.
- [Release notes](https://github.com/pypa/twine/releases)
- [Changelog](https://github.com/pypa/twine/blob/master/docs/changelog.rst)
- [Commits](pypa/twine@3.3.0...3.4.1)

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

setup.py

@@ -19,8 +19,8 @@
             "pytest==6.2.2",
             "pytest-mock==3.5.1",
             "requests-mock==1.8.0",
-            "twine==3.3.0",
-            "flake8==3.8.4",
+            "twine==3.4.1",
+            "flake8==3.9.0",
             "black==20.8b1",
             "commitizen==2.16.0",
             "pytest-cov==2.11.1",