Merge branch 'release' into 2.0/singleusebindings

auth/confirm.go

auth/receivedConfirm.go

auth/state.go

bindings/autheticatedConnection.go

bindings/cmix.go

bindings/connect.go

bindings/e2e.go

bindings/e2eHandler.go

bindings/params.go

bindings/restlike.go

cmd/broadcast.go

cmd/callbacks.go

cmd/fileTransfer.go

cmd/group.go

cmd/root.go

cmd/single.go

cmd/ud.go

cmix.go

cmix/message/handler.go

cmix/message/handler_test.go