Add cacheStrategy option

[kaorun343]

What is the problem you're trying to solve?

It seems the current cache strategy of Stylelint is the same with ESLint and Prettier's metadata strategy. When running on CI, each file metadata can change at every single CI execution.

What solution would you like to see?

ESLint and Prettier supports content cache strategy. This strategy doesn't depends on metadata but depends on each file's content, so it is very useful when running them at CI.

• https://eslint.org/docs/user-guide/command-line-interface#--cache-strategy
• https://prettier.io/docs/en/cli.html#--cache-strategy

[jeddy3]

@kaorun343 Thanks for the request and for using the template.

A new cacheStrategy option (being metadata (default) or content) that is available via the Node.js API and the CLI sounds good to me.

I've labelled the issue as ready to implement. Please consider contributing if you have time.