BREAKING CHANGES: Please review our upgrade guide.

Update Terraform SDK to v2 (#594). Remove deprecated helm_repository resource and data source (#600) Remove implicit support for KUBECONFIG (#604) Remove load_config_file attribute (#604) Remove set_string attribute from helm_release (#608)

IMPROVEMENTS:

Add support for multiple paths to kubeconfig files (#636) Remove remote dependencies from test-fixtures (#638) Set up matrix build to run acc tests against different tf versions (#637)