Update protobuf requirement from ^2.17.0 to ^3.2.0

[dependabot[bot]]

Updates the requirements on protobuf to permit the latest version.

Changelog

Sourced from protobuf's changelog.

[3.2.0] - 2022-09-26

• Correctly specify log version
• Hash for SpecialFields

[3.1.0] - 2022-06-22

• Reflection API to clear fields

[3.0.3] - 2022-05-31

• optional fields in proto3 are now handled correctly in protoc-gen-rust plugin for protoc

[3.0.2] - 2022-05-06

• Sort modules in generated mod.rs

[3.0.1] - 2022-05-01

• More up to date readme.

[3.0.0] - 2022-05-01

• New stable version released.

Before version 3

Changelog before version 3

Commits

• 7155092 Bump version to 3.2.0
• af0751d Select log version 0.4
• 2044851 Hash for SpecialFields
• 3737ede cargo fmt
• e6e5653 Bump version to 3.2.0-pre
• c65c7d5 Bump version to 3.1.0
• 70cd66e Move clear_field reflection test
• 7f70813 Reflection clear_field tests
• d4aa230 Allow clearing field via reflection
• a9ca7ed Bump version to 3.1.0-pre
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)