Bump pathspec from 0.8.0 to 0.8.1

Bumps [pathspec](https://github.com/cpburnz/python-path-specification) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/cpburnz/python-path-specification/releases)
- [Changelog](https://github.com/cpburnz/python-path-specification/blob/master/CHANGES.rst)
- [Commits](https://github.com/cpburnz/python-path-specification/commits)

sphinx-doc/requirements_sphinx.txt

@@ -31,7 +31,7 @@ outlier==0.2
 outlier-utils==0.0.3
 packaging==20.1
 pandas==1.1.4
-pathspec==0.8.0
+pathspec==0.8.1
 pluggy==0.13.1
 py==1.8.1
 pyarrow==1.0.1