Add bs in data attributes

- Add `bs` in data APIs everywhere
- Update unit tests

js/tests/integration/bundle-modularity.js

@@ -2,6 +2,6 @@ import 'popper.js'
 import Tooltip from '../../dist/tooltip'
 
 window.addEventListener('load', () => {
-  [...document.querySelectorAll('[data-toggle="tooltip"]')]
+  [...document.querySelectorAll('[data-bs-toggle="tooltip"]')]
     .map(tooltipNode => new Tooltip(tooltipNode))
 })