Dependabot security alerts misidentifies npm: prefixed dependencies as the wrong package in package.json

[mrdaniellewis]

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Example repo: https://github.com/citizensadvice/test-dependabot-npm-dependencies

This is a node package and has a single dependency of "canvas": "npm:@napi-rs/canvas@^0.1.60"

This is an alias of canvas to the alternative package @napi-rs/canvas@^0.1.60

I am getting security alerts for canvas version < 1.6.11 and not for @napi-rs/canvas which is what is actually installed.

(Sorry if already reported. I can't see anything obvious that is the same).

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