Change ComponentReference "hasFeature" to "refersTo

[tcmitchell]

See https://github.com/SynBioDex/SBOL-specification/issues/461 for the origin story.

This depends on changes in:

• https://github.com/SynBioDex/sbol-owl3 to update the ontology
  • This work is currently on a branch
• https://github.com/SynBioDex/sbol-shacl to update the SHACL validation rules from the new ontology
  • This work is currently on a branch
• https://github.com/SynBioDex/SBOLTestSuite
  • Waiting for https://github.com/SynBioDex/SBOLTestSuite/issues/36