Release v0.20.0

Removed

• Breaking: QADataset, DatasetMetadata and EvaluationInput are gone. Nothing produced or accepted them: the
  evaluators take strings, and a QA set is the QAPair list. Migration: serialize the QAPair list yourself.

Documentation

• AddFluxImproverWithLMSupply's parameter docs read correctly. The lifetime and disposeModel descriptions were
  nested inside each other, so the generated API docs showed them garbled.

Changed

• The packages from this repository depend on each other at exactly the same version ([x.y.z]), not a floor.
  A consumer that moves one of them while a family member it depends on resolves at an older version now gets restore warning NU1608 naming
  the pair (an error where warnings are errors) — before, the mixed versions restored silently and could fail at run time.
  A member that reaches you only through another package's floor is not covered: pin every member you load and move them together.
• The nuget.org «Release Notes» of every package link to the GitHub release of its version, whose notes are this CHANGELOG's section for that version.

Removed

• Breaking: ParentChunkContext.ParentId and HierarchyLevel — enrichment reads the parent's summary, keywords and
  heading path; nothing read these two. Migration: delete the assignments.

Dependencies

• Re-pinned sibling package(s) LMSupply.Generator 0.115.1 -> 0.116.0, LMSupply.Generator.Onnx 0.115.1 -> 0.116.0.