Bump zipp from 2.2.0 to 3.1.0

Bumps [zipp](https://github.com/jaraco/zipp) from 2.2.0 to 3.1.0.
- [Release notes](https://github.com/jaraco/zipp/releases)
- [Changelog](https://github.com/jaraco/zipp/blob/master/CHANGES.rst)
- [Commits](https://github.com/jaraco/zipp/compare/v2.2.0...v3.1.0)

requirements.txt

@@ -30,5 +30,5 @@ scikit-learn==0.22.1
 scipy==1.4.1
 six==1.14.0
 wcwidth==0.1.8
-zipp==2.2.0
+zipp==3.1.0
 astor==0.8.1