* Modify line curve on token price chart to fix inconsistency on steep drops/increases and glyph placement

* Make curve required on LineChart

* Add curve to SparkLine chart

* Remove dependency: d3-curve-circlecornders - no longer used

* Drop d3-curve-circlecorner from react-app-env
Co-authored-by: gbugyis <greg@bugyis.com>