bug: localStorage is not defined

[Sasha]

This is a bug report

Problem

localStorage storage is not defined

Proposed Solutions

js-waku/packages/discovery/src/local-peer-cache/index.ts

Line 139 in 6758265

 localStorage.setItem("waku:peers", JSON.stringify(this.peers)); 

should be protected the same way as

js-waku/packages/discovery/src/local-peer-cache/index.ts

Line 127 in 6758265

 try {