Merge pull request #12 from quamotion/fixes/optional-arguments

.../Protocol/iOS/Inspector/EvaluateForTestInFrontendEvent.cs

source/ChromeDevTools/Protocol/iOS/Inspector/InspectEvent.cs

...romeDevTools/Protocol/iOS/Inspector/TargetCrashedEvent.cs

...romeDevTools/Protocol/iOS/LayerTree/CompositingReasons.cs

source/ChromeDevTools/Protocol/iOS/LayerTree/Layer.cs

...evTools/Protocol/iOS/LayerTree/LayerTreeDidChangeEvent.cs

source/ChromeDevTools/Protocol/iOS/Network/CachedResource.cs

.../ChromeDevTools/Protocol/iOS/Network/DataReceivedEvent.cs

source/ChromeDevTools/Protocol/iOS/Network/Initiator.cs

...ChromeDevTools/Protocol/iOS/Network/LoadingFailedEvent.cs

...romeDevTools/Protocol/iOS/Network/LoadingFinishedEvent.cs

source/ChromeDevTools/Protocol/iOS/Network/Request.cs

...Tools/Protocol/iOS/Network/RequestServedFromCacheEvent.cs

...Protocol/iOS/Network/RequestServedFromMemoryCacheEvent.cs

...meDevTools/Protocol/iOS/Network/RequestWillBeSentEvent.cs

source/ChromeDevTools/Protocol/iOS/Network/Response.cs

...omeDevTools/Protocol/iOS/Network/ResponseReceivedEvent.cs

...romeDevTools/Protocol/iOS/Network/WebSocketClosedEvent.cs

...omeDevTools/Protocol/iOS/Network/WebSocketCreatedEvent.cs

...DevTools/Protocol/iOS/Network/WebSocketFrameErrorEvent.cs