code: function checkForAndDeleteMaxCacheVersions(options, serverless) {
    // If we're using the static cache, and we have static cache max versions enabled
    if (
      options.useStaticCache &&
      options.staticCacheMaxVersions &&
      parseInt(options.staticCacheMaxVersions) > 0
    ) {
      // Get the list of our cache files
      const files = glob.sync(
        [path.join(getUserCachePath(options), '*_slspyc/')],
        { mark: true }
      );
      // Check if we have too many
      if (files.length >= options.staticCacheMaxVersions) {
        // Sort by modified time
        files.sort(function(a, b) {
          return (
            fse.statSync(a).mtime.getTime() - fse.statSync(b).mtime.getTime()
          );
        });
        // Remove the older files...
        var items = 0;
        for (
          var i = 0;
          i < files.length - options.staticCacheMaxVersions + 1;
          i++
        ) {
          rimraf.sync(files[i]);
          items++;
        }
        // Log the number of cache files flushed
        serverless.cli.log(
          `Removed ${items} items from cache because of staticCacheMaxVersions`
        );
      }
    }
  }
docs: This helper will check if we're using static cache and have max
  versions enabled and will delete older versions in a fifo fashion
  @param  {Object} options
  @param  {Object} serverless
  @return {undefined}