Vimanam v0.4.0

Fixed

• Fatal errors are now printed to stderr regardless of the RUST_LOG setting,
  instead of being silently swallowed when logging was not enabled (#14)
• --method-filter is now case-insensitive; methods are stored uppercase, so a
  lowercase value such as --method-filter get previously matched nothing and
  silently produced empty output (#13)
• --service-filter is now case-insensitive, for the same reason (#19)
• clean_for_id now collapses runs of 3+ consecutive separators into a single
  dash, so anchor IDs derived from inputs like a///b are clean (#15)
• The ## Authentication section is now emitted in spec order and is
  deterministic across runs; security_schemes switched from HashMap to
  IndexMap, and serde_json's preserve_order feature keeps OpenAPI 2.0
  securityDefinitions in declaration order rather than alphabetical (#16)
• The table of contents and body sections now share one endpoint ordering in
  every view, so TOC anchor links always point to the corresponding section in
  document order (#18)

Changed

• Schema composition variant indices (allOf/oneOf/anyOf) are now 0-based
  (allOf[0], allOf[1], ...) to match JSON Pointer/jq conventions (#21)

Performance

• $ref resolution no longer re-serializes the entire spec on every reference;
  the spec is serialized to JSON once per parse, making $ref-heavy large specs
  significantly faster (#17)

Internal

• --group-by is no longer wrapped in a misleading Option (it always has a
  clap default), removing an unreachable fallback branch (#20)

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Binaries for Linux, macOS (Intel & Apple Silicon), and Windows are attached. Also available via cargo install vimanam.