XXMessengerClient - Search Users

See merge request elixxir/elixxir-dapps-sdk-swift!64

Messenger example - network status

See merge request elixxir/elixxir-dapps-sdk-swift!63

Messenger example - account deletion

See merge request elixxir/elixxir-dapps-sdk-swift!62

Update Bindings

See merge request elixxir/elixxir-dapps-sdk-swift!60

- Rename TrackServicesCallbackResult to MessageServiceListElement
- Add MessageServiceList typealias

Use TrackServicesCallbackResult model

elixxir/client@2bf3c3bf
go version go1.17.13 darwin/arm64
Xcode 13.4.1 Build version 13F100
gomobile bind target: ios,iossimulator,macos

Update MessengerDestory

See merge request elixxir/elixxir-dapps-sdk-swift!59

Update MessengerDestroy

See merge request elixxir/elixxir-dapps-sdk-swift!58

- stop network follower if running
- wait until cMix has no running processes

Update messenger example

See merge request elixxir/elixxir-dapps-sdk-swift!57