release 2.2

first rc for 2.2; requires namespace annotation to control which role…

…s are permitted to be assumed within a namespace

release 2.1 with support for grpc client load balancing

release 2.0

release rc3 with updates to reduce aws api calls

release new rc for 2.0 with configurable prefetcher buffer size

first release of new kiam

release 1.2.1: minor improvement to error logging

release v1.2.0

fix issue with default proxy handler to metadata service