v2021.2.0 protected

Kyle Sunden

@ksunden

e53faa47 · Merge branch 'relesae' into 'master' · Feb 12, 2021

Release: v2021.2.0

### Added
- has-mapping trait definition, see [YEP-311](https://yeps.yaq.fyi/311/)
- fields for has-position
- fields for is-discrete
- fields for has-limits