Merge pull request #122 from AlexNikic/main

Thanks Alex!I think you found the solution

Author: woodthom2

tox.ini

@@ -9,6 +9,7 @@ deps =
     pytest
     twine
     build
+    matplotlib
 commands =
     check-manifest --ignore 'tox.ini,tests/**,.editorconfig,vscode.env,.vscode/**'
     python -m build