code: function optimizeSVGs(src) {
    const startOptimizeTaskName = swlog.logSubStart('optimize SVGs');
  
    // Optimize with svgo:
    const svgoOptimize = new svgo({
      js2svg: { useShortTags: false },
      plugins: [
        { removeViewBox: false },
        { convertColors: { currentColor: '#000000' }},
        { removeDimensions: true },
        { moveGroupAttrsToElems: true },
        { removeUselessStrokeAndFill: true },
        { customSvgoRemoveGroupFill },
        { customSvgoNonScalingStroke },
        { customSvgoFillStroke }
      ]
    });
  
    const svgFiles = glob.sync(`${src}/*.svg`);
  
    // Divide each optimization into a promise
    const svgPromises = svgFiles.map(async filepath => {
      try {
        const data = await readFile(filepath, 'utf8');
        const dataOptimized = await svgoOptimize.optimize(data);
  
        await writeFile(filepath, dataOptimized.data, 'utf-8');
      } catch(err) {
        swlog.error(err);
      }
    });
  
    return Promise.all(svgPromises).then(() => {
      swlog.logSubEnd(startOptimizeTaskName);
    }).catch(swlog.error);
  }
docs: Optimize the generated .svg icon files
  @param {String} src - The source directory for svgs