fix: #29

Add missing export to barrel

Author: awesomephant

components/src/index.js

@@ -7,3 +7,4 @@ export { default as Button } from './Button/Button.svelte';
 export { default as Select } from './Select/Select.svelte';
 export { default as DesignTokens } from './DesignTokens/DesignTokens.svelte';
 export { default as ChartHeader } from './ChartHeader/ChartHeader.svelte';
+export { default as ChartFooter } from './ChartFooter/ChartFooter.svelte';