Marctable

What's Changed
* Add support for converting from MARCXML by edsu in https://github.com/sul-dlss-labs/marctable/pull/10


**Full Changelog**: https://github.com/sul-dlss-labs/marctable/compare/v0.3.2...v0.4.0

- Fix a bug where the CSV column headers were getting repeated for each batch.

- updated command line help documentation to reflect Avram Schema is JSON not YAML

What's Changed
* Check types and style in CI by edsu in https://github.com/edsu/marctable/pull/6

**Full Changelog**: https://github.com/edsu/marctable/compare/v0.2.0...v0.3.0

What's Changed
* Switch to Avram by edsu in https://github.com/edsu/marctable/pull/3
* Extend Avram schema by nichtich in https://github.com/edsu/marctable/pull/4

New Contributors
* nichtich made their first contribution in https://github.com/edsu/marctable/pull/4

**Full Changelog**: https://github.com/edsu/marctable/compare/v0.1.0...v0.2.0