Bot attempts to update pre-1.0 minor version number

[tcharding]

Is there an existing issue for this?

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Package ecosystem

Rust crates, cargo package manager

Package manager version

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Language version

Rust

Manifest location and content before the Dependabot update

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dependabot.yml content

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Updated dependency

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What you expected to see, versus what you actually saw

Dependabot is raising PRs to update the minor version number of Rust crates (example linked below). IIUC semver treats pre-1.0 releases differently from post 1.0 - specifically minor version update is treated as a major release i.e., breaking changes are allowed in a minor version number upgrade. Therefore dependabot should not be attempting, again IIUC, to do minor version upgrades for pre-1.0 releases.

romanz/electrs#1032

Native package manager behavior

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Images of the diff or a link to the PR, issue, or logs

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Smallest manifest that reproduces the issue

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