Pass in terser options or custom minimizer

[manferlo81]

I am using this plugin and the final size of my bundle doesn't match the size shown, probably because I am using my own terser plugin options, so it would be interesting if we could pass terser options to your plugin so your plugin can use it to get the minified size, hope it makes sense.

Also what is I use another minifier (say uglifyjs)? I dont think the sizes will match either.