Add SipMessage and cdr events to TS types

[alexandremiguelabreu]

We notice that some definitions were missing in the TypeScript types declaration.

This PR adds the support of the following events:

• cdr:attempt
• cdr:start
• cdr:stop

The connect and error events also were fixed with the callback parameters. Added the tags in the Srf constructor.

For the CDR event, we also create a new interface called SipMessage.

Do you agree with that?

[alexandremiguelabreu]

Hi, @guilherme-rauen!

I've added some improvements to the TS types declaration with this PR, can you do a review, please?