Messenger example - auth requests handling

See merge request elixxir/elixxir-dapps-sdk-swift!76

# Conflicts:
#	Sources/XXMessengerClient/Messenger/Functions/MessengerVerifyContact.swift
#	Tests/XXMessengerClientTests/Messenger/Functions/MessengerVerifyContactTests.swift

Add MessengerVerifyContact function

See merge request elixxir/elixxir-dapps-sdk-swift!80

Update Bindings

See merge request elixxir/elixxir-dapps-sdk-swift!79

elixxir/client@a9465e95
go version go1.17.13 darwin/arm64
Xcode 13.4.1 Build version 13F100
gomobile bind target: ios,iossimulator,macos

Update Bindings

See merge request elixxir/elixxir-dapps-sdk-swift!78

elixxir/client@12144ff4
go version go1.17.13 darwin/arm64
Xcode 13.4.1 Build version 13F100
gomobile bind target: ios,iossimulator,macos

Messenger example - update dependencies

See merge request elixxir/elixxir-dapps-sdk-swift!77