Register a listener that fires whenever the pasteboard contents change.
Because macOS provides no pasteboard change notification API, this is implemented by
polling changeCount at the interval specified by watcherInterval.
Parameters
event: "change"
The event to listen for (the only event this module emits)
listener: (changeCount:number)=>void
Called with the new changeCount whenever the pasteboard changes
Register a listener that fires whenever the pasteboard contents change. Because macOS provides no pasteboard change notification API, this is implemented by polling
changeCountat the interval specified bywatcherInterval.