Allow custom tag processors/minifiers

A bit of a stretch, but maybe it would make html-minifier easier to extend and less reliant on the maintainers, should other “plugins” come along (base64 minifier? jade templates? frameworktron-3000 awesomizer?)

This would allow me to just pop in a configuration like the following to add support for #381:

    {
        customMinifiers: [
            {
                regex: /<svg>.*<\/svg>/, // lazy regex
                parser: function (content) {
                    return svgo.optimize(content);
                }
            }
        ]
    }

[alexlamsl]

#378 not yet possible, everything else works.

Sorry for misreading this issue then - reopening…

[fregante]

But that’s not what I meant by custom with this issue, I meant custom tags, not custom processors 😕

Is my example in the second comment feasible?