v1.2.0

Flatbread - v1.2.0 Release Notes

• flatbread proof install-skill installs the Proof skill that shipped with
  the running CLI and pins that same flatbread version as a devDependency
  (#267). End-user docs now tell people to run
  npx --yes flatbread@latest proof install-skill, so README copy-paste
  blocks no longer need a version or git tag on every release.