Bug: Duplicate conversation issues due to case insensitive equality check

[Nicholas Molnar]

Describe the bug

A developer is experiencing duplicate conversations in v11. We believe it may be related to a case-insensitive check here: https://github.com/xmtp/xmtp-js/blob/main/src/conversations/Conversations.ts#L490

Expected behavior

Conversations are de-duplicated irrespective of wallet address capitalization

Steps to reproduce the bug

1. Create a conversation with the address using standard checksum formatting
2. Call client.conversations.newConversation with the same address lowercased
3. Call client.conversations.list()

One conversation should be returned.