Describe the bug

<b-popover> drops data-* attributes

Steps to reproduce the bug

1. Add <b-popover data-test="test" .../>
2. Click trigger element
3. Inspect rendered dom for data-attrs
4. Don't find it.

Expected behavior

That Bootstrap Vue components render data-* attributes on root components, as stated here: #3896 (comment)

Versions

Libraries:

• BootstrapVue: 2.17.1,
• Bootstrap: 4.5.2
• Vue: 2.6.12

Environment:

• Doesn't matter

Demo link

Minimal demo: https://jsfiddle.net/cm2ef49x/1