1.2.26

• Package Loader: Ignore problems reading spec.internals file in old IGs
• Version conversion: Fix up round-tripping of XPath constraints R4/R5
• Snapshot Generator: Fix appending text when generating snapshots
• Validator: Add support for fhir_comments in R2/R2B
• Validator: Add validator checking around versions in extension URLs
• Validator: Fix bug generating cross-version extensions
• Renderer: Add support for liquid filters (resolve FHIRPath conflict)
• Renderer: Add new view for Profile Bindings
• Renderer: Add new view for Profile Obligations
• Renderer: Add new view for Profile Expansion
• Misc: Various minor NPEs fixed
• Go Publish: Rework how go publish works (again)