fix: VariableSizeList typing

[puehringer]

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Issue

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Summary of changes

• With the latest release of @types/react, the VariableSizeList is not a "component" anymore

src/vis/bar/BarChart.tsx:420:18 - error TS2786: 'VariableSizeList' cannot be used as a JSX component.
  Its type 'typeof VariableSizeList' is not a valid JSX element type.
    Types of construct signatures are incompatible.
      Type 'new <T = any>(props: VariableSizeListProps<T>) => VariableSizeList<T>' is not assignable to type 'new (props: any, deprecatedLegacyContext?: any) => Component<any, any, any>'.
        Property 'refs' is missing in type 'VariableSizeList<any>' but required in type 'Component<any, any, any>'.

420                 <VariableSizeList
                     ~~~~~~~~~~~~~~~~

  node_modules/@types/react/index.d.ts:1033:9
    1033         refs: {
                 ~~~~
    'refs' is declared here.

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