Add support for custom TLS certificate authority bundle

[messense]

Custom TLS CA can be configured via one of the MATURIN_CA_BUNDLE, REQUESTS_CA_BUNDLE and CURL_CA_BUNDLE env vars.

Closes #1418

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[messense]

@aalekhpatel07 can you give this a try? You need to clone my branch and run cargo run upload path/to/wheel.whl with one of the MATURIN_CA_BUNDLE, REQUESTS_CA_BUNLDE and CURL_CA_BUNDLE env var.

[messense]

I've tested this locally and it seems working, so I'm going to merge it now, feel free to open a new issue if it somehow doesn't work for you.

bors r+

[aalekhpatel07]

That sounds excellent. Thanks for your work on this PR!

My apologies, I haven't gotten around to testing in my dev env yet. I'll create an issue if the problem persists, as you suggested.

Wondering if you'd know the version of the release with this patch.

[messense]

Wondering if you'd know the version of the release with this patch.

I'll release a new 1.0.0 beta version for testing, then you can install it via pip install -U --pre maturin.

[aalekhpatel07]

That'd be wonderful. Thanks again!

[bors]

Build succeeded:

• conclusion
• Test (arm64 Linux)
• Test (arm64 macOS)
• Test (x86_64 FreeBSD)

[messense]

@aalekhpatel07 A new beta is out in PyPI: https://pypi.org/project/maturin/1.0.0b2/