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 `@waku/core` with unit tests:
- [ ] filter;
- [ ] lightPush;
- [ ] message;
- [ ] metadata;
- [ ] store;
- [ ] streamManager;
- [ ] baseProtocol;
- [ ] connectionManager;
- [ ] keepAliveManger;