Add converse actions & maintenance

[ospaarmann]

I added support for the actions Converse and ConverseStream since they offer a unified interface to interact with different models available on Bedrock and are the recommended way when using Tool Calling.

We recommend using the Converse API as it provides a consistent API, that works with all Amazon Bedrock models that support tool use.
Source

I also did some maintenance (bump dependency versions) and made sure all tests pass.

And I included the code from the PR that @holsee raised. I don't want to hijack your code, I just wanted to include your changes and your PR was open for a very long time. I hope this is ok. Maybe the maintainers can first merge your PR, since it is identical.

I hope someone sees this, since the library hasn't been active in some time.

Resources:

• https://docs.aws.amazon.com/bedrock/latest/userguide/tool-use-inference-call.html
• https://docs.aws.amazon.com/bedrock/latest/userguide/tool-use.html