org.hl7.fhir.core/RELEASE_NOTES.md

Validator Changes

• Fix issue loading SPDX value set + Fix missing code for 'not-open-source'
• Allow target to be treated as source when validating FML
• Fix issues validating names and urls for logical models
• Don't duplicate warnings about missing expressions on invariants in R5

Other code changes

• Handle case where base hasn't got a snapshot generating snapshots