Added

• Support CSV and JSON Lines formats for exporting results
• Emit requeststarted, requestskipped, requestfinished, requestfailed, maxdepthreached, maxrequestreached and disconnected events.
• Improve debug logs by tracing public APIs and events.

Changed

• Allow onSuccess and evaluatePage options as null.
• Change crawler.isPaused, crawler.queueSize, crawler.pendingQueueSize and crawler.requestedCount from read-only properties to methods.

Fixed

• Fix a bug of ignoring maxDepth option.