Stable promotion of 0.1.4-alpha. No code changes from the alpha; this release
drops the pre-release suffix to signal that the v0.1 public API surface is
considered production-ready for Bash parsing use cases (see SPEC.md §17
acceptance criteria). Consumers on any 0.1.x-alpha can upgrade directly.
See the 0.1.4-alpha notes below for the full list of changes in this version.