String::truncate() support for html text

[Kehet]

It would be great if String::truncate() would also support truncating text with html tags (and not breaking everything with orphan tags) since this is quite common problem in any website which accepts user text content

[norberttech]

👍 for that but maybe in different function, like String::truncateHtml

[smeeckaert]

I have done it. I will post a PR shortly if everything is okay.

[norberttech]

@smeeckaert nice!

[smeeckaert]

See #30

[norberttech]

#30 was merged