purgecss-webpack-plugin name can't deduced by speed-measure-webpack-plugin

[alireza-mh]

I recently updated purgecss-webpack-plugin from 1.6 to 3.0.0 and noticed that smp can't any longer deduce the plugin name and return (unable to deduce plugin name). the responsible code for this is:

(plugin.constructor && plugin.constructor.name) ||
"(unable to deduce plugin name)";

I assume that's because purgecss-webpack-plugin transpile without a class name since I add a class name to it directly in node_modules and the issue resolved.