Feature request: Make line chart accessible for blind or keyboard-only users

[julianna-ciq]

The data presented in the npmTrends chart is great visually, but isn't accessible to blind users. Additionally, the tooltips are available with mouse hovers, but is not available to users who can't use a mouse.

If you would be interested, I can open a pull request to incorporate Chart2Music into the TrendGraph component, which would provide interactive sonification and support both user personas.