Update sphinx requirement from ^3.0.0 to ^4.0.0

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/4.x/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v3.0.0...v4.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

diff --git a/pyproject.toml b/pyproject.toml
index 05ab9bbfacd51948c0eb287dc4c655b73b53807e..dd522f8d3c8d254406e4247a61d4fdd01f192f06 100644 (file)
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ mypy = "^0.812"
 pytest = ">=5.4.1,<7"
 pytest-cov = "^2.10.0"
 flake8 = "^3.7.9"
-sphinx = "^3.0.0"
+sphinx = "^4.0.0"
 coverage = "^5.1"
 twine = "^3.1.1"
 wheel = "^0.35.0"