Metadata: escape display name in email addresses

[robsdedude]

This follows the way setuptools handles email addresses from pyproject.toml files.

See here where it utilizes the std lib package email, which in turn escapes email addresses here and then here.

I noticed this bug when I tried to upload a package to PyPI with something like this in my pyproject.toml:

[project]
# ...
authors = [
    {name = "FooBar, Inc.", email = "[email protected]"}
]
# ...

PyPI rejected the package:

HTTPError: 400 Bad Request from https://test.pypi.org/legacy/
'FooBar, Inc. <[email protected]>' is an invalid value for Author-email.
Error: Use a valid email address See
https://packaging.python.org/specifications/core-metadata for more
information.

As a workaround, I changed my pyproject.toml to

[project]
# ...
authors = [
    {email = "\"FooBar, Inc.\" <[email protected]>"}
]
# ...

[netlify]

✅ Deploy Preview for maturin-guide ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	693f81f
🔍 Latest deploy log	https://app.netlify.com/sites/maturin-guide/deploys/6543980afa3b7300086d6c09
😎 Deploy Preview	https://deploy-preview-1832--maturin-guide.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[messense]

Thanks! Can you also add a test case for the new function?

[robsdedude]

@messense tests added.

[messense]

LGTM, thanks!