Currently output metrics that looks like this:
# HELP eks_version_exporter Bunch of values
# TYPE eks_version_exporter gauge
eks_version_exporter{eks_latest_available_version="1.18.0",last_updated="1603289688143",last_updated_text="2020-10-21 14:14:48.143734000",server_current_version="1.15.0"} 0