## Validator Changes
* update FHIRPath implementation for corrections to 'as' (R5 only in validator)
* Critical Security fix: enforce correct paths when unpacking archives (SecurityAdvisory-1082, CVE TBA)
## Other code changes
* Update to latest FHIRPath for older versions
* Add new ElementModel based parser for StructureMaps
* go-publish related changes
* FTP Client upload and logging improvements
* Refactor base64 handling for Android compatibility
## Security Note
The validator unzips archive files to the local file system when
it is scanning zip files it has been asked to validate, and when it is
installing packages. These processes are now resistant to the zip-slip
vulnerability.
***NO_CI***
* Update cache and comparison downloads to use https
* Zip Slip tests and fix
* Zip Slip tests 2 and fix
* Add missing tempDir child in ScannerTest
* Add win format zip test
* Add tests to r4b
* Add tests and fixes for slips in tgz processing
* Update fhir-test-cases version
## Validator Changes
* Better tracking and reporting of snapshot generation issues
* Update FHIRPath implementation to R4 with all corrections and extensions from R5 implemnetation
## Other code changes
* Inclusion of SAXON dependency for processing XSLT
* Error message spacing correction
* Basic FTPClient implementation
* test NPE in markdown processing
* go-publish support
* Start implementing loading structure maps with validation
***NO_CI***
* Update R4 FHIRPath implementation from R5, and get all tests passing
* test NPE in markdown processing
* go-publish support
* Start implementing loading structure maps with validation
* release notes
* more work on FTP
* Fix breaking test.
* Add fhir-test-cases to r4 pom to fix breaking test
Co-authored-by: Grahame Grieve <grahameg@gmail.ccom>
Co-authored-by: dotasek <david.otasek@smilecdr.com>
## Validator Changes
* Add support for fhir_comments in R2/R2B
* Add validator checking around versions in extension URLs
* Fix bug generating cross-version extensions
## Other code changes
* Fix minor NPEs running IG publisher
* Add new PE module (PEDefinition/PEInstance)
* Add support for liquid filters (resolve FHIRPath conflict)
* Fix up round-tripping of XPath constraints R4/R5
* Refactor R5 ProfileUtilities (and move rendering to rendering package)
* Fix appending text when generating snapshots
***NO_CI***
