Update twine from 3.1.1 to 3.2.0

Author: pyup-bot

requirements-dev.txt

@@ -10,6 +10,6 @@ pygments==2.6.1
 sphinx==3.1.1
 sphinx_rtd_theme==0.5.0
 coverage==5.1
-twine==3.1.1
+twine==3.2.0
 wheel==0.34.2
 advbumpversion==1.2.0