Update twine from 2.0.0 to 3.0.0

Author: pyup-bot

dev-requirements.txt

@@ -23,7 +23,7 @@ PyYAML==5.1.2
 Sphinx==2.2.1
 sphinx-autodoc-typehints==1.10.3
 sphinxcontrib-spelling==4.3.0
-twine==2.0.0
+twine==3.0.0
 versioneer==0.18
 vulture==1.1
 VWS-Python-Mock==2019.9.28.0