What's Changed
* fix(chat): add missing chat response properties by Tomas2D in https://github.com/IBM/ibm-generative-ai-node-sdk/pull/65
* chore: update models in texts and tests by Tomas2D in https://github.com/IBM/ibm-generative-ai-node-sdk/pull/62
* chore(langchain): updates by Tomas2D in https://github.com/IBM/ibm-generative-ai-node-sdk/pull/63
**Full Changelog**: https://github.com/IBM/ibm-generative-ai-node-sdk/compare/v1.5.0...v1.5.1