1.3.0

• Bug fix from @piax93 where node_exists was being called but did not exist (#158)
• Bug fix from @KevinHock where an INVALID_ARN was causing other findings to incorrectly occur (#159)
• Readme now references https://github.com/z0ph/aws_managed_policies and @KevinHock also made some spelling fixes.
• Updates IAM data