Cecilia Vela Gurovic authored Jun 01, 2018 and Robert Lyon committed Aug 07, 2018

Attributes
  Breaking change: .removeAttr() no longer sets properties to false
    - replace removeAttr with checked, selected,  readonly or disabled -migration tool also complained about this last one- and replace with .prop("attr", false)
  Breaking change: select-multiple with nothing selected returns an empty array
    - could not find any select multiple elements
  Deprecated: .toggleClass() with no arguments and .toggleClass( Boolean )
    - there are no .toggleClass() or toggleClass( Boolean ) in core

behatnotneeded

Change-Id: I20c941b1bcd9b1be3ae22907ab83b59b157fbd88