Use dependencies cache to reduce CI time #95
Description
https://docs.github.com/en/actions/guides/building-and-testing-python
https://github.com/actions/cache
https://docs.github.com/en/actions/guides/caching-dependencies-to-speed-up-workflows
https://github.com/deepset-ai/haystack/blob/master/.github/workflows/ci.yml