Add option that prevents filtering out script files

[aaronhargrove-grub]

Hello, I was wondering if it was possible to add a new optional parameter with a name like includeAll to the options object that would let all files (including script extensions) to go through the rollup process as long as they respect the include and exclude options? I see these extensions are filtered out by default: json, mjs, js, jsx, ts, tsx. If you'd like me to make the PR for it let me know.

Thanks