[3.8] bpo-47194: Update zlib to v1.2.12 on Windows to resolve CVE-2018-25032 (GH-32241)

[miss-islington]

(cherry picked from commit 6066739)

Co-authored-by: Zachary Ware zach@python.org

https://bugs.python.org/issue47194

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a failure ❌ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a failure ❌ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

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[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

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Sorry, I can't merge this PR. Reason: You're not authorized to push to this branch. Visit https://docs.github.com/articles/about-protected-branches/ for more information..

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[vstinner]

The Docs CI job failed with:

Missing the required blurb or sphinx-build tools.
Please run 'make venv' to install local copies.

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

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Sorry, I can't merge this PR. Reason: You're not authorized to push to this branch. Visit https://docs.github.com/articles/about-protected-branches/ for more information..

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

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[vstinner]

LGTM, good bot.

@ambv: Can you please merge this security fix? The fix already landed in the 3.7 branch.

[miss-islington]

@zware and @zooba: Status check is done, and it's a success ✅ .

[miss-islington]

Sorry, I can't merge this PR. Reason: You're not authorized to push to this branch. Visit https://docs.github.com/articles/about-protected-branches/ for more information..