v1.0.0: First stable release

This release provides a new API, described thoroughly in #36. Consumer and Producer behavior now has dedicated classes and configurations, annotated with types. The open API is preserved.

v0.2.0: Use certifi trust store by default

This release adds the feature described in #31: it configures the Kafka client to use certifi's set of CA certificates by default. This should improve portability when talking to brokers with SSL enabled.