Skip running ESLint on ignored files

[kylewlacy]

I started configuring vite-plugin-checker for one of my projects today, and I ran into the same issue described in #115. I'm not entirely clear why that issue was closed, as it seemed to me that vite-plugin-checker was still trying to lint ignored files, even in the latest release.

This PR updates the ESLint checker to resolve #115 more directly. Now, when a file changes, the plugin calls eslint.isPathIgnored to see if the file has been ignored in the ESLint config. This should avoid the warning.

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[Scanerrr]

@kylewlacy will it fix this issue?
WARNING(ESLint) File ignored because of a matching ignore pattern. Use "--no-ignore" to override. (undefined)

[kylewlacy]

@Scanerrr Yes, it should fix that warning!

[groundfloorwebb]

I'd love to see this get merged, nicely done @kylewlacy ! This is causing a lot of noise on my project.