Handling the case when the JSON response is null during an error when using the js client request method.
Merge pull request #26 from timothyarmstrong/null_json_response

Handling the case when the JSON response is null during an error
Merge branch 'master' of https://github.com/dart-gde/discovery_api_dart_client_generator into m4_breaking_changes
update pub constraints for the generated packages.
update hop
remove AsyncError
Merge pull request #24 from financeCoding/m4_breaking_changes

M4 breaking changes
Merge branch 'master' of https://github.com/dart-gde/discovery_api_dart_client_generator into dart-gde-master