Allow column options to override defaults and correct save method

What's Changed

• allow column options to override defaults by @justDare in #22
• fix save function not returning the model by @hbatalhaStch in #30

New Contributors

• @justDare made their first contribution in #22
• @hbatalhaStch made their first contribution in #30

Full Changelog: v1.0.7...v1.0.8