Add support for querying dev status

[billsykes]

This is useful for being able to query development related data such as which branches are associated with a ticket.

[KanoYugoro]

This repo hasn't gotten any support in quite some time. You may want to check out our fork which is more up to date:

https://github.com/jira-node/node-jira-client https://www.npmjs.com/package/jira-client