License and readme

LICENSE.md

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+The MIT License (MIT)
+=====================
+
+Copyright © 2021 Anton Smirnov
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the “Software”), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# sass-hsv
+
+[![npm](https://img.shields.io/npm/v/sass-hsv?style=flat-square)](https://www.npmjs.com/package/sass-hsv)
+[![NPM](https://img.shields.io/npm/l/sass-hsv?style=flat-square)](https://www.npmjs.com/package/sass-hsv)
+
+A simple helper to introduce [HSV/HSB] model support to SASS.
+
+## Usage
+
+The helper tries to mimic `hsl()` syntax from css.
+
+The easiest way to import the helper is to use [node-sass-package-importer].
+
+```scss
+// node-sass-package-importer path syntax, adjust for your favorite importer
+@use "~sass-hsv" as *;
+
+a {
+    // the simplest
+    color: hsv(270, 50%, 100%); // #bf7fff
+    // use other angle units for h and fractions for s & v
+    color: hsv(0.75turn, 0.5, 1); // #bf7fff
+    // use alpha channel
+    color: hsv(270, 50%, 100%, 0.5); // rgba(191, 127, 255, 0.5)
+
+    // aliases
+    color: hsb(270, 50%, 100%); // same as hsv()
+    color: hsva(270, 50%, 100%, 1); // same as hsv($h, $s, $v, $a) but alpha param is required
+    color: hsba(270, 50%, 100%, 1); // same as hsva()
+}
+```
+
+## License
+
+The library is available as open source under the terms of the [MIT License].
+
+[HSV/HSB]: https://en.wikipedia.org/wiki/HSL_and_HSV
+[node-sass-package-importer]: https://www.npmjs.com/package/node-sass-package-importer
+[MIT License]:  https://opensource.org/licenses/MIT