bug: filter sdk does not dial newly added peers

[weboko]

This is a bug report

Problem

When maintainPeers happens from the background in BaseProtocol - it does not notify SubscriptionManager to send a subscription request.

Due to this messages are not getting received when subscription was created right on start of an app without reliable peers.

Proposed Solutions

Create a notify mechanism that would trigger subscription request if renew happened in BaseProtocol.

Note

Partially blocks - waku-org/lab.waku.org#68

[weboko]

Seems not to be happening against waku-org/lab.waku.org#83 with @waku/[email protected]