org.hl7.fhir.core/RELEASE_NOTES.md

Validator:

• Add date addition/subtraction to FHIRPath + add parsing comments
• Fix questionnaire mode parameter support for validator
• add extra debugging when valdiator can't fetch content to validate
• fix error setting up mapping log

Other code changes:

• rename org.hl7.fhir.utilities.cache to org.hl7.fhir.utilities.npm
• report error locations for run time FHIRPath errors
• add search on IG registry to PackageClient
• add focus to FHIRPath function extensions
• fix rendering of definitions in CodeSystems
• fix error rendering bundles in bundles