Various fixes mainly for wallet side of walletconnect

[3ph]

@RootSoft - there are some issue I've discovered while trying to implement wallet side of WalletConnect:

• PeerId and PeerMeta correctly returned in approveSession (otherwise dApp will ignore the response)
• PeerId is added to subscriptions when the session approved
• Initialization of transport and subscriptions moved to createSession so a new session can be created using the same connector after the old one is killed
• In killSession sending requests is awaited before transport is closed (otherwise transport is closed before the request is sent)

[RootSoft]

I'll go over the changes next week @3ph Gonne need to check and align with the monorepo

Thanks for the PR!

[3ph]

I'll post a new PR that has changes from 0.0.8.