test(module) {
          return (
            !isCss(module) &&
            module.size() > 100000 &&
            /_snowpack[/\\]pkg[/\\]/.test(module.identifier())
          );
        }
NPM libraries larger than 100KB are pulled into their own chunk

We use a smaller cutoff than the reference implementation (which does 150KB),
because our babel-loader config compresses whitespace with `compact: true`.