Changes in version 0.1.9                        

  - assume_role() was incorrectly passing role's policy with the request
    in case the role was an \code{iam_role} object, which is both
    unnecessary (the role policy is aways applied regardless) and
    depending on the role policy illegal (e.g., if the role defined
    principal-based restrictions).
  - add get_federation_token(..., policy_arns=) to support IAM-managed
    policies in addition to inline session policies.
  - added a test suite (#1)

                 Changes in version 0.1.8 (2020-04-07)                  

  - Fixed missing location_credentials import (#14)
  - Added support for session tags via tags and transitive.tags
    parameters.
  - Re-factored the way credentials are stored. Chained credentials are
    supported by providing a stack of credentials. Credential management
    functions are now exported and documented.

                 Changes in version 0.1.7 (2017-07-01)                  

                        Changes in version 0.1.6                        

  - Expanded documentation.

                        Changes in version 0.1.5                        

  - Bump aws.signature dependency to 0.3.4.

                        Changes in version 0.1.4                        

  - Documentation fixes. (#5)
  - Swapped import of XML to xml2.

                        Changes in version 0.1.3                        

  - Implement the Security Token Service (STS) API. (#4)

  - All exported functions should be working.
  - Add package documentation.

                        Changes in version 0.1.1                        

  - Initial release.