Don't titlecase HTML entity character references

For example, I'm seeing `&` become `&Amp;`, which makes validation fail using my third-party HTML validator.

There is currently no workaround for this issue that I'm aware of because adding in `&` into the `smallWords` parameter doesn't work because line 85 in `index.js` expects an alphanumeric pattern. So you have to put `amp` instead of `&` into the `smallWords` set - which isn't ideal.


Great package by the way.

Thanks

Start in index.js at line 85, where the smallWords parameter is matched against an alphanumeric pattern. Reproduce the example with the HTML entity reference amp; and compare it with the current titlecasing behavior. Done means entity character references are not titlecased, while the existing smallWords behavior remains usable.

Written by the indexing model from the issue text.