Making the next JavaScript Arrow release

[Wes McKinney]

hi folks,

With all the work that's happened in JavaScript, my understanding from
Slack and GitHub conversations is that we'd like to do a JS-0.3.0 and
get updates published thereafter to NPM. I see there's an open PR at
the moment -- anything else that needs to get done before I kick off a
release vote?

Thanks,
Wes