cql2 0.5.5

Parse, validate, and convert Common Query Language (CQL2) text and JSON
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{"op":"t_during","args":[{"interval":[{"property":"starts_at"},{"property":"ends_at"}]},{"interval":["2017-06-10T07:30:00Z","2017-06-11T10:30:00Z"]}]}
t_during(INTERVAL(starts_at,ends_at), INTERVAL('2017-06-10T07:30:00Z','2017-06-11T10:30:00Z'))
{"op":"t_during","args":[{"interval":[{"property":"starts_at"},{"property":"ends_at"}]},{"interval":["2017-06-10T07:30:00Z","2017-06-11T10:30:00Z"]}]}