Update the config.js library file to look for release-it.cjs

[sirbeagle]

Hi there. This is a super-simple pull request that adds to the config.js library file to look for release-it.cjs in addition to release-it.js as a possible configuration file.

In our company we use release-it to help automate versioning and packaging a bunch of different repositories. Most of the repos use the same release configuration, and as part of a general consolidation effort we'd like to look at a single configuration with the ability to override it if necessary.

We trying out a new mechanism where we are storing the release-it configuration in a .js file and putting in a little bit of logic to make overrides dead simple.

A typical configuration file in one of the repos might look something like this:

const releaseItConfig = require('@buildinglink/js-build-tools/release-it-base-configuration')

const releaseItOverrides = {
  // uncomment the next line to prevent any automatic updates to imported packages
  lockPackageVersions: true
}

module.exports = releaseItConfig(releaseItOverrides)

Neat! Our only problem? Most of our repos are set up as modules, so in order to keep with using CommonJS for release-it configurations we have to use .cjs as the file extension. Hence this PR. ;-) The cosmiconfig package that the config.js file is using seems to follow a similar approach.

Thank you for your consideration, and thank you for all of the hard work you've put into release-it! We love it!

[webpro]

Thanks @sirbeagle, it's now in v14.6.0.