Yarn v2 support needed

Is your feature request related to a problem? Please describe.

Yarn v2 introduced a new lockfile format that now adheres to YAML. I believe ATM when trying to run lockfile-lint on a project with yarn v2, lockfile-lint tries to use the v1 parser and fails with an error.

ABORTING lockfile lint process due to error exceptions

Unable to parse lockfile "yarn.lock"

SyntaxError: Unknown token: {line: 3, col: 2, type: ''INVALID', value: undefined } 3:2 in lockfile

Describe the solution you’d like

As far as I can tell, yarn v2 does not have an equivalent lockfile parser. But since it adheres to YAML now, I’m wondering if it is possible to just use a parser like yaml and create a small function to transform it like parseNpmLockfile?

Describe alternatives you’ve considered

None.

[brad-decker]

@kachkaev if you or someone else wants to tackle please go for it. Otherwise i’ll take a stab at it soon

[candrews]

Can the title of this issue please be updated to “Yarn v2 support needed” for accuracy since NPM v7 is already supported?