build(execa): upgrade execa@9.0.2

[iiroj]

This PR updates to the latest execa version 9, and bumps minimum required Node.js version from 18.12.0 to 18.19.0.

I wouldn't consider this a breaking change because 18 LTS is still receiving updates and the current version is at 18.20.2.

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🦋 Changeset detected

Latest commit: 8329266

The changes in this PR will be included in the next version bump.

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lint-staged	Minor

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[iiroj]

What do you think, @okonet, should this be a breaking change?

Personally I would be ok with this, and only doing breaking changes when dropping support for 18 completely (in the future). IMO people should track the latest major LTS release anyway, so in this case the latest 18.20.2.

[iiroj]

Following the Semver spec strictly would indeed make this breaking change, if we assume people don't update their Node.js 18 version or are for some reason locked to an older one.

[fetwar]

Personally I think this should be considered a breaking change as per semver, at least that way there is less chance of someone missing the node version upgrade thinking there aren't any breaking changes... then breaking their build