Spreewald 1.2.11 fixes frequent "no alert open" errors on Chrome

When running capybara with Chrome you might start seeing frequent "no alert open" errors when trying to interact with browser dialogs. This seems to be triggered by a recent Chrome update.

Apparently these dialogs no longer appear instantly. Spreewald 1.2.11 fixes the "When I confirm the browser dialog" and similar steps by waiting for the dialog to appear.