ReferenceError: ResizeObserver is not defined

ResizeObserver is not available on Firefox Mobile. Try to use polyfills and stuff, probably will need more than just for that API.

https://sentry.io/organizations/ctoon/issues/2540593134/?referrer=gitlab_plugin

ReferenceError: ResizeObserver is not defined
  at createResizeObserver (./node_modules/chart.js/dist/chart.esm.js:3179:20)
  at addEventListener (./node_modules/chart.js/dist/chart.esm.js:3253:21)
  at _add (./node_modules/chart.js/dist/chart.esm.js:5909:16)
  at attached (./node_modules/chart.js/dist/chart.esm.js:5928:7)
  at bindResponsiveEvents (./node_modules/chart.js/dist/chart.esm.js:5937:7)
...
(17 additional frame(s) were not displayed)