cuprite 0.18 on Ruby Gems

Support time inputs [#245]
Add initial support for shadow_root [#234]
Support Capybara::Cuprite::Node#rect [#276]
Extend Node#set with the datetime-local input type [#295]
Support HTML5 drag-and-drop and drag modifier keys in Node#drag_to [#315]
Support Element#drop for files and strings [#316]
Add :raise_on_unhandled_modal browser option to raise instead of warn on an unhandled modal [#320]

Ensure the node has focus before setting value [#280]
Raise ObsoleteNode instead of silently acting on a node that got disconnected from the DOM between being found and being used [#239]
Capybara::Cuprite::Node#send_keys ignores empty or nil keys instead of raising, matching the Selenium and rack_test drivers [#313]
Driver#switch_to_frame accepts a Capybara::Cuprite::Node instead of only a wrapped Capybara::Node::Element [#312]
Report tag_name as "ShadowRoot" for shadow root nodes [#318]
Treat non-summary descendants of a closed <details> element as non-visible [#317]
switch_to_window sends Target.activateTarget so Chrome reactivates the window's renderer immediately instead of leaving it backgrounded, which could stall the next input command for several seconds [#321]
Node#set fires input and change events for a color input, since its value can only be set via JavaScript and never gets them naturally [#229]
Generate a FocusEvent (not a generic Event) for focus-related events (blur, focus, focusin, focusout), matching real browser behavior [#272]