Distros are built twice each

[barmac]

Describe the Bug

The configuration in the distro task triggers rollup twice for each viewer, and rollup itself contains two UMD configurations. This causes each distro to be built twice.

Steps to Reproduce

Steps to reproduce the behavior:

1. Run npm run distro
2. Observer log

If you report a modeling related issue, ensure you can reproduce it on demo.bpmn.io

When reporting a library error, try to build an example that reproduces your problem. You can use our playgrounds for viewer or modeler as a starting point or put a demo up on GitHub for inspection.

Expected Behavior

Run each job once.

Environment

Please complete the following information:

• Browser: [e.g. IE 11, Chrome 69]
• OS: [e.g. Windows 7]
• Library version: [e.g. 2.0.0]

[barmac]

This is not critical, but rather annoying.