feat: unit testing @waku/sdk

[weboko]

This is a support request

Problem

We have poor coverage on basic primitives in the code and E2E testing is too heavy to test such small things / changes.
This task should cover reliability improvements delivered so far.

Proposed Solutions

Cover:

• create;
• baseProtocol;
• fitler;
• lightPush;
• store (can be delayed before feat: store v3 #2029 is complete;
• utils;
• waku;

[weboko]

Point to address - add testing for renewPeer and improve f99c513
#2115 (comment)