[ospec] Add o.timeout() to set a timeout for Promise-based async tests
[ospec] Add o.timeout() to set a timeout for Promise-based async tests

barneycarroll/mithril.js,barneycarroll/mithril.js,impinball/mithril.js,lhorie/mithril.js,MithrilJS/mithril.js,pygy/mithril.js,MithrilJS/mithril.js,impinball/mithril.js,pygy/mithril.js,lhorie/mithril.js