Import vega packages via package.json (React)

[saifulkhan]

` <script src="https://cdn.jsdelivr.net/npm/vega@5.20.2" />

<script src="https://cdn.jsdelivr.net/npm/vega-lite@5.1.0" /> <script src="https://cdn.jsdelivr.net/npm/vega-embed@6.17.0" /> ` These packages should be in package.json, if possible.

[phongvis]

Do we use vega in our development? I didn't add those lines so I'm not sure.