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

...ChromeDevTools/Protocol/iOS/DOM/AttributeModifiedEvent.cs

.../ChromeDevTools/Protocol/iOS/DOM/AttributeRemovedEvent.cs

...meDevTools/Protocol/iOS/DOM/CharacterDataModifiedEvent.cs

...meDevTools/Protocol/iOS/DOM/ChildNodeCountUpdatedEvent.cs

...ChromeDevTools/Protocol/iOS/DOM/ChildNodeInsertedEvent.cs

.../ChromeDevTools/Protocol/iOS/DOM/ChildNodeRemovedEvent.cs

...e/ChromeDevTools/Protocol/iOS/DOM/DocumentUpdatedEvent.cs

source/ChromeDevTools/Protocol/iOS/DOM/EventListener.cs

...Tools/Protocol/iOS/DOM/GetEventListenersForNodeCommand.cs

source/ChromeDevTools/Protocol/iOS/DOM/HighlightConfig.cs

.../ChromeDevTools/Protocol/iOS/DOM/HighlightFrameCommand.cs

...e/ChromeDevTools/Protocol/iOS/DOM/HighlightNodeCommand.cs

...e/ChromeDevTools/Protocol/iOS/DOM/HighlightQuadCommand.cs

...e/ChromeDevTools/Protocol/iOS/DOM/HighlightRectCommand.cs

...romeDevTools/Protocol/iOS/DOM/HighlightSelectorCommand.cs

...eDevTools/Protocol/iOS/DOM/InlineStyleInvalidatedEvent.cs

source/ChromeDevTools/Protocol/iOS/DOM/MoveToCommand.cs

source/ChromeDevTools/Protocol/iOS/DOM/Node.cs

...e/ChromeDevTools/Protocol/iOS/DOM/PerformSearchCommand.cs

...hromeDevTools/Protocol/iOS/DOM/PseudoElementAddedEvent.cs