Without this, coveralls didn't receive the branch info thus leading to failures when we switched branches.

Stack in cards in one column when < md

`version` is deprecated.

- Rename and move the variable to variables file
- Move code to the grid file
- Use the mixin to generate our own classes
- Wrap in a grid classes enabled conditional
- Document the mixin

Trying to find a new way to do responsive card decks while not locking ourselves into the cards themselves. My thinking here is we can easily control the column (.col) width by the parent, but I don't know how many we need (have 0-5 now) across each breakpoint. This works for cards so far, and I think could get us equal height, too.

The example shortcode already adds this.

Use the built-in utilities instead.

Also, add a warning in _root.scss so that we don't miss it again.

dropdown show method should do the same as toggle

* Allow bundlesize to run for forks too.
* Add name for clone step.
* Add` fail-fast: false`

dropdown - destroy old popper.js references

allow to pass popper.js configuration for tooltip/popover and dropdown