Add support for line and offset

[midzelis]

Would love to be able to get the start/end position of the tag and attributes.

[ashi009]

PRs are welcomed.

[gpetrov]

I will be also very interested to see that

Btw @ashi009 - why are there so many forks and the main branch here is running so much behind?

I see at least two well developed forks:
https://github.com/taoqf/node-html-parser
https://github.com/jnarowski/node-html-parser

I wonder why you can't merge it all together ... and add a core functionality like the line and offset :)

a single source of truth is better than divided forks.