Fix issue 120: problem in Angular project#121

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Enovea:fix-issue-120

Commits on Oct 25, 2021

upgrade d3 version to 7.1.0 to avoid using d3-collection which is deprecated and which causes problems in angular because d3-collection overrides some collections classes, by ex: Map, Set.
mengyu.liu
committed
improvements of rollup configuration.
mengyu.liu
committed