v0.1.2

Fixed

• The kept sandbox preserves empty directories. The incremental
  materialisation that the default kept sandbox uses mirrored files and
  symlinks only, so a directory with nothing in it never reached the sandbox —
  and a shallow git checkout under deps/ keeps .git/refs/heads and
  .git/refs/tags empty. git then no longer recognised the checkout and Mix
  reported every git dependency as a lock mismatch before the metamutant could
  compile; a freshly generated Phoenix 1.8 app (heroicons, daisyui) could
  not run Mutare at all.
• Rendering no longer consults the target project's .formatter.exs.
  Sourceror reads locals_without_parens from it through Mix.Tasks.Format on
  every render — evaluating its import_deps and plugins inside Mutare's own
  process — and Mix could refuse the lookup mid-scan ("Unknown dependency
  :ecto_sql given to :import_deps"). Every render now pins the option
  (Mutare.AST.render_opts/1); a parsed call keeps the spelling its metadata
  records, and a node built without metadata renders with parentheses.
• mix igniter.install mutare fetches the companion packages it adds. The
  companions are chosen from the project's own deps at run time, and Igniter
  writes a dep added that way to mix.exs without fetching it — so the
  generated .mutare.exs named modules of packages that were never fetched or
  locked. The installer now applies the mix.exs change and runs deps.get
  before writing .mutare.exs.