v2.10.0

Gate dependencies

• sm doctor --required-deps is applicability-aware (#315) — the dependency
  manifest now excludes tools belonging to gates that don't apply to the repo
  (e.g. the Dart/Flutter gates when there's no pubspec.yaml). A gate that
  won't run doesn't make its tools "required", so the manifest — and the v2
  GitHub Action that installs from it — reflects exactly what the repo actually
  needs, instead of warning about system tools for gates that never execute.