v0.3.20

What's Changed

• help CLI command by @hrshdhgd in #335
• Labels not required while parsing obo-json by @hrshdhgd in #331
• Clarifies possible doc format in --help docstrings by @hrshdhgd in #336
• Fix issue where label is missing for an id in obographs parser by @matentzn in #337
• Corrected flag and remove blank prefixes by @hrshdhgd in #338

Full Changelog: v0.3.19...v0.3.20