Bump gunicorn from 20.0.4 to 20.1.0 (#208)

Bumps [gunicorn](https://github.com/benoitc/gunicorn) from 20.0.4 to 20.1.0.
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](https://github.com/benoitc/gunicorn/compare/20.0.4...20.1.0)

---
updated-dependencies:
- dependency-name: gunicorn
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -60,7 +60,7 @@ setup(
         'bokeh==2.3.2',
         'pandas==1.1.5',
         'flydenity==0.1.5',
-        'gunicorn==20.0.4'
+        'gunicorn==20.1.0'
     ],
     test_require=[
         'pytest==5.0.1',