v3.14.0

What's Changed

• feat: add fetch methods for observations and traces by @marcklingen in https://github.com/langfuse/langfuse-js/pull/284
  • fetchTrace
  • fetchTraces
  • fetchObservation
  • fetchObservations
• chore: add error logs for non-serializable bodies by @hassiebp in https://github.com/langfuse/langfuse-js/pull/283

Full Changelog: https://github.com/langfuse/langfuse-js/compare/v3.13.0...v3.14.0