code: function stylesDocs() {
    return gulp.src( 'docs/src/css/main.less' )
      .pipe( gulpLess( {
        paths: [ 'node_modules/cf-*/src/' ],
        compress: true
      } ) )
      .pipe( gulpPostcss( [
        autoprefixer( {
          browsers: BROWSER_LIST.LAST_2_PLUS_IE_8_AND_UP
        } )
      ] ) )
      .pipe( gulp.dest( 'docs/dist/css/' ) );
  }
docs: Process CSS for the docs.
  @returns {PassThrough} A source stream.