Markdown-it Superscript Plugin

This package provides a dedicated plugin for the popular `markdown-it` markdown parser, specifically designed to render superscript text. It utilizes a Pandoc-like `^...^` syntax; for instance, the input `29^th^` will be processed into `29<sup>th</sup>`. The current stable version is 2.0.0. As a single-feature plugin for a stable core library like `markdown-it`, its release cadence is generally infrequent, primarily driven by maintenance needs, compatibility updates with `markdown-it` itself, or bug fixes. A key characteristic is its straightforward integration with `markdown-it` and its adherence to a commonly understood markup convention for superscripts, making it easy to adopt for existing `markdown-it` projects. Notably, the plugin currently does not support nested superscript markup.