[ARROW-4780] [JS] Package sourcemap files, update default package JS version

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: JS-0.4.0
• Fix Version/s: JS-0.4.1
• Component/s: JavaScript
• Labels: pull-request-available
• Assignee: Paul Taylor
• Reporter: Paul Taylor
• Created: 06/Mar/19 02:21
• Updated: 06/Mar/19 11:36
• Resolved: 06/Mar/19 11:35

Description

The build should split the sourcemaps out to speed up client builds, and include a "module" entry in the package.json for @pika/web, and the main package should ship the latest ESNext JS versions.

Issue Links

• links to: GitHub Pull Request #3818