* feat: update to popper v2

BREAKING CHANGE: only breaking if you pass a popperConfig directly to overlay or dropdown components. The config format is now the v2 one. This change only relevant to users of `popperConfig` prop on Overlay, OverlayTrigger, and Dropdown

* docs: update some packages, clean up version dropdown a bit

* Apply suggestions from code review

* fail in the right place

* clean up popper injected props

* fix types

Co-authored-by: Jimmy Jia <tesrin@gmail.com>