Deepeval

What's Changed
* Rename HOW_TO_CONTRIBUTE.md to CONTRIBUTING.md by penguine-ip in https://github.com/confident-ai/deepeval/pull/164
* add image similarity metric by ColabDog in https://github.com/confident-ai/deepeval/pull/162
* Feature/add image similarity by ColabDog in https://github.com/confident-ai/deepeval/pull/165


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.19.0...v0.20.0

What's Changed
* add guardrails integration by ColabDog in https://github.com/confident-ai/deepeval/pull/158
* add github workflow results by ColabDog in https://github.com/confident-ai/deepeval/pull/159
* Feature/add llm eval by ColabDog in https://github.com/confident-ai/deepeval/pull/161


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.18.0...v0.19.0

What's Changed
* Add new customer support example by ColabDog in https://github.com/confident-ai/deepeval/pull/154
* Add example test case by ColabDog in https://github.com/confident-ai/deepeval/pull/156


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.17.9...v0.18.0

What's Changed
* fix the API and version by ColabDog in https://github.com/confident-ai/deepeval/pull/153


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.17.8...v0.17.9

What's Changed
* fix by ColabDog in https://github.com/confident-ai/deepeval/pull/147
* add context to the API by ColabDog in https://github.com/confident-ai/deepeval/pull/150
* Resolves 151 by ColabDog in https://github.com/confident-ai/deepeval/pull/152


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.17.6...v0.17.8

What's Changed
* adding length metric including test and documentation by j-space-b in https://github.com/confident-ai/deepeval/pull/139
* add koala by ColabDog in https://github.com/confident-ai/deepeval/pull/141
* Feature/update file name by ColabDog in https://github.com/confident-ai/deepeval/pull/145
* add switch CLI by ColabDog in https://github.com/confident-ai/deepeval/pull/146


**Full Changelog**: https://github.com/confident-ai/deepeval/compare/v0.17.5...v0.17.6