v0.2.1 - Fix for Unix Timestamp types

Thanks to @nicolasterral for submitting PR #21 that adds Unix Timestamp compatibility to relative date querying introduced in v0.2.0.

This release has been tested with Metabase v0.33.4.

Install it release by downloading athena.metabase-driver.jar to a plugins/ folder wherever you are running Metabase from. Happy queries!