Node.js agent v5.5.0

February 19, 2019

Added SNS to message shim library names.
Added check for collect_span_events in config sent from the server on connect.
Collection of span events can be disabled from the server configuration, but not enabled.

Refactored Segment#toJSON to be more readable.
Added a try/catch to config initialization to safely handle invalid setting combinations.
When an error is caught the agent is marked as disabled, which ultimately returns a stub API and keeps the process running.
String truncation is now done using a binary search over the byte length of the string.
Previously this truncation was done using a linear search for the proper byte length.
Optimized segment and span attribute filtering.

Fixed issue where shim.createSegment() could result in modifying the parent when opaque.
Fixed issue where http-outbound would modify parent segments when parent is opaque.
Moved processing of exclusive time attribute out of toJSON and into finalize to only be calculated once.
Previously, serializing a segment would result in calculating and caching exclusive time which could result in issues if serialized prior to ending.