Update shadow-rs requirement from 0.29.0 to 0.30.0

[dependabot[bot]]

Updates the requirements on shadow-rs to permit the latest version.

Release notes

Sourced from shadow-rs's releases.

Fix git generated value to be empty

• Fix #164
• Add features #163

Commits

• e9e45b3 Update Cargo.toml
• 5a83032 Merge pull request #167 from baoyachi/issue/164
• 25e072c Develop a git command to retrieve the corresponding information.
• 149639e Merge pull request #166 from baoyachi/issue/153
• d6f3ced add default_deny method
• 6d1aa0f change method visibility
• 48ab3c7 change method visibility
• 42dc425 Merge pull request #165 from baoyachi/issue/153
• 0508f45 fix example
• d33c3ec fix unit test
• Additional commits viewable in compare view

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