Fix Vue Bootstrap Popover import.

[robjbrain]

At some point Vue Bootstrap as changed and the import should be import { BPopover } from 'bootstrap-vue' rather than import { BPopover } from 'bootstrap-vue/es/components/popover/popover' this pull request fixes that.

Fixes: https://github.com/SirLamer/click-confirm/issues/14

[TanvirAlam]

When do you think this will be merged?

[frobert]

Hi any updates on this issue?

[adriangonzales]

If you want to use this PR before it gets merged, you can specify it in your install like this:

npm install SirLamer/click-confirm#pull/16/head --save

Or like this in your package.json

"click-confirm": "github:SirLamer/click-confirm#pull/16/head"