Update pubspec.yaml

formatting, version update

update version and deps, fixed tests, fixed dynamic realm creation

changed arguments and argumentsKeyword signature to make subtype acce…

…ss easier.

Merge remote-tracking branch 'github/master' into master

channel binding is sent as null, realm is allowed to be null explicit…

…ly, update version

updated deps, updated version, exported cryptosign api

updated tests, updated version

fixes konsultaner#17 and fixed an issue with the msgpack serializer, …

…add custom subscribe options, some more docs comments

make code less generic. replace Tuple class with SerializedPayload fo…

…r better self explained code