search with only udp as option

[Shudhu7]

Addressing issues #63
The section you're referring to for handling UDP in your Browser class is located in the constructor, specifically where the protocol is assigned in the following line:
this.name = ServiceToString({ name: opts.type, protocol: opts.protocol || 'tcp'}) + TLD
Solution
To ensure that the protocol is correctly set to udp when you're searching for UDP services, modify this line to explicitly check if the protocol is passed and ensure it's used. Here's the modified code:
this.name = ServiceToString({ name: opts.type, protocol: opts.protocol || 'udp'}) + TLD;
Explanation:
Original Line:

The protocol defaults to tcp if it is not specified in opts. This could override your intention to use udp.
Updated Line:

By changing the default to udp, you ensure that when the protocol is not provided, udp is used. Alternatively, if you prefer more control, you could make this default customizable based on the use case.

This modification should allow the Browser to correctly handle UDP services when they are searched for. Let me know if you need further assistance with the implementation!

[mdidon]

No need to adjust default protocol to support UDP. UDP can be called by setting protocol property on BrowserOpts.
This pull request also includes unreleated code.