Fix build-test workflow cache step

[notmandatory]

• Fix build-test workflow cache step
• Pin de-dependency versions for zip and base64ct to work with MSRV 1.57
• Add feature gates in doc tests
• Fix rust 1.65.0 clippy warning derive-partial-eq-without-eq
• Include required async in async-https feature

[coveralls]

Pull Request Test Coverage Report for Build 4418139500

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 80.173%

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Totals
Change from base Build 4415563573:	0.1%
Covered Lines:	833
Relevant Lines:	1039

---

💛 - Coveralls

[vladimirfomene]

ACK e634904

[coveralls]

Pull Request Test Coverage Report for Build 4417691513

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 80.173%

---

Totals
Change from base Build 4415563573:	0.1%
Covered Lines:	833
Relevant Lines:	1039

---

💛 - Coveralls