Update to highcharts 11.x

[anselmbradford]

Project should be updated to use highcharts 8.2.0, or whatever is the latest.

Currently, the update produces some clipping of the line charts and the labels have moved down:

[anselmbradford]

Highcharts 9.0.0 has been released https://www.highcharts.com/blog/changelog/#highcharts-v9.0.0

[anselmbradford]

Packages before 9 have a vulnerability https://github.com/cfpb/consumerfinance.gov/security/dependabot

[anselmbradford]

Highcharts 10.0.0 is out https://www.highcharts.com/blog/news/highcharts-version-10-0/

[anselmbradford]

Highcharts 11.1.x is out https://www.highcharts.com/blog/post/highcharts-version-11-1/