feat #113 (quantity selector): fix export in index.esm.js

js/index.esm.js

@@ -14,6 +14,7 @@ export { default as Collapse } from './src/collapse'
 export { default as Dropdown } from './src/dropdown'
 export { default as Modal } from './src/modal'
 export { default as Offcanvas } from './src/offcanvas'
+export { default as QuantitySelector} from './src/quantity-selector'
 export { default as Popover } from './src/popover'
 export { default as ScrollSpy } from './src/scrollspy'
 export { default as Tab } from './src/tab'