Update to SVGO version 2.3.X

[owensgit]

The svgo package is now on version 2.3.X which introduces a new way of setting the config.

Instead of a JSON file, it's now a JS module.

Docs: https://github.com/svg/svgo#configuration

E.g.

module.exports = {
  plugins: [
    // enable a built-in plugin by name
    'builtinPluginName',
    // or by expanded version
    {
      name: 'builtinPluginName'
    },
    // some plugins allow/require to pass options
    {
      name: 'builtinPluginName',
      params: {
        optionName: 'optionValue'
      }
    }
  ]
}

svg-to-ts has a --svgoConfig option which looks for a JSON file. This should probably be updated to use the new module config instead.

E.g.

--svgoConfig svgo.config.js