elonlo opened a new pull request #3703:
URL: https://github.com/apache/incubator-dolphinscheduler/pull/3703
## What is the purpose of the pull request
The frontend introduces the dagre library, and uses the layered graph
drawing algorithm to calculate the position of each task node
## Brief change log
- *Add dagre:0.8.5 to package.json*
- *Add dagre info to LICENSE file*
- *Add LICENSE-dagre new file*
- *Modify dag.js reformat logic*
## Verify this pull request
before

after

This change added tests and can be verified as follows:
- *Manually verified the change by testing locally.*
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