Add support for .cjs configs

[mbrevda]

Add support for .cjs files

Background

cosmiconfig v7 added support for .cjs config files. This is useful in scenarios where the package is using es6 modules (e.g. package.json type parameter is set to module) but the config files are still in common js. Unfortionaltly, a config file ending with .cjs is not current supported:

# ls lint-staged*
lint-staged.config.cjs
# npx lint-staged  -d
  lint-staged:bin Running `[email protected]` +0ms
  lint-staged:bin Options parsed from command-line: {
  allowEmpty: false,
  concurrent: true,
  configPath: undefined,
  debug: true,
  maxArgLength: 131072,
  stash: true,
  quiet: false,
  relative: false,
  shell: false,
  verbose: false
} +1ms
  lint-staged Loading config using `cosmiconfig` +0ms
Config could not be found.

Please make sure you have created it correctly.
See https://github.com/okonet/lint-staged#configuration.

Prior Art

By way of example, Prettier added similar support here.

[codecov]

Codecov Report

Merging #909 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #909   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines          608       608           
  Branches       143       143           
=========================================
  Hits           608       608           

Impacted Files	Coverage Δ
lib/index.js	100.00% <ø> (ø)

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[mbrevda]

Thanks for the approval! How can we get this released?

[github-actions]

🎉 This PR is included in version 10.4.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀