Add twine check to tox

[tabebqena]

If it possible, It will has benifit to add the twine check in tox:

`python -m build --sdist --wheel .
 python -m twine check dist/*`

That commands run by the github action will-it-build.

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[jugmac00]

Indeed - we could add a check. Currently I am the only one who creates releases, so I think it is not a very urgent issue.

[jugmac00]

@tabebqena Would you like to provide a pull request?

[tabebqena]

Currently I am the only one who creates releases, so I think it is not a very urgent issue.

In one trial of my pull request, the tox ran successfully in my local code and failed after pushing it.

@tabebqena Would you like to provide a pull request?

Sorry, I think that I have no experience with it.

[jugmac00]

@tabebqena
I thought a bit about it, and I do not think it is worth it.

My will-it-build GitHub Action is more like a toy example as I wanted to try out how to create a GitHub Action myself.

When running tox we already build the package, so I