mac系统image-webpack-loader压缩图片一直报错
一堆这样的错误：node_modules/pngquant-bin/vendor/pngquant ENOENT
node_modules/mozjpeg/vendor/cjpeg ENOENT
上网查找解决办法，然后安装libpng
$ brew install libpng
Updating Homebrew...
^CWarning: libpng 1.6.34 is already installed
安装后还是继续报同样的错误，怎么办
注：我的代码：
{
test: /\.(png|jpg|svg|gif)$/i,
loaders: [
'url-loader?limit=20000&name=[name]-[hash:5].[ext]',
'image-webpack-loader'
]
}
