fix(jqLite): pass a dummy event into triggerHandler

Previously, anchor elements could not be used with triggerHandler because
triggerHandler passes null as the event, and any anchor element with an empty
href automatically calls event.preventDefault(). Instead, pass a dummy event
when using triggerHandler, similar to what full jQuery does. Modified from
PR #2379.
feat(ngdocs): Add FullText search to replace Google search in docs
test($animator): ensure invalid $sniffer.transitions and $sniffer.animations flags are caught in animation spec code
feat($animator): provide support for custom animation events