2.0.0-alpha.17

Fixed

• Storing an imagine variant again replaces its file info, so _metadata.mediaObjects reports the variant actually stored after a filter's format, quality or size changes. Variant rows written before this fix stay stale: delete them with DELETE FROM _acb_imagine_cached_file_metadata WHERE filter <> '';, then purge the HTTP cache, and each row is read again from its stored variant on the next render (#421, #422)