bump msrv since openssl fails to compile

[arlyon]

Summary

Also fixes some new lints from new rust compiler versions and re-enables a test that was accidentally not being run.

Checklist

• [x] ran cargo make fmt
• [x] using conventional commits to hightlight user-facing fixes and features

[arlyon]

• #617 👈
• master

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[arlyon]

:tada: This PR is included in version 0.39.2 :tada:

The release is available on:

• v0.39.2
• GitHub release

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