Lint only changed files

[mateossh]

Description

Another approach to #1190.

I cherry-picked @yanfali commits from his PR, removed eslint-*-prettier packages since they won't be necessary and installed lint-staged package.

Questions:

1. Is having concurrently task necessary in package.json? I don't think anyone would run this manually.
2. This PR is configured to use prettier, not parallel-prettier packaged. Should I remove @mixer/parallel-prettier or use it instead of normal prettier?

[yanfali]

Are they equivalent. Does prettier format vue sfc? Also parallel is much faster than regular iirc on multicore systems. Might need to verify that. Benchmarks as to why to make this change? My biggest concern is sfc. If they aren't getting formatted this isn't a replacement.

[yanfali]

All the white space changes and double quotes are out of scope

[mateossh]

I know. I will use this patch to benchmark prettier/pprettier performance and then remove this from PR.

[yanfali]

bump