v0.1.3

Changed

• Pretty-print each JSONL record using JSON structure instead of preserving each
  record as one physical output line.
• Generalized XML wording to XML-compatible markup and documented the
  well-formed markup boundary for HTML-like inputs.
• Added .html, .htm, and .xhtml auto-detection through the existing
  XML-compatible markup formatter.

Added

• Added a deeply nested JSONL record to examples/events.jsonl as a regression
  showcase.
• Added examples/page.html for well-formed HTML markup formatting.