v3.3.0

• #151 IAM support phase I - instead of username and password, use apikey and iam_endpoint for IAM.
• Minor improvements to tests: #154, #153, #149
• Updated dependencies for security 🔒 #152

(Note that getClient() may be deprecated (but not removed) in the future and replaced with connect(), this would be a change to client code, see #155 for more discussion.)