Updated files with 'repo_helper'. (#1)

Co-authored-by: repo-helper[bot] <74742576+repo-helper[bot]@users.noreply.github.com>

Author: repo-helper[bot]

pyproject.toml

@@ -24,7 +24,7 @@ Homepage = "https://github.com/python-coincidence/testing-tox"
 "Source Code" = "https://github.com/python-coincidence/testing-tox"
 
 [tool.mkrecipe]
-extras = [ "all",]
+extras = "all"
 conda-channels = [ "python-coincidence",]
 
 [tool.whey]