[readme] rename and add badges

readme.markdown → README.md

@@ -1,4 +1,11 @@
-# minimist
+# minimist <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
+
+[![github actions][actions-image]][actions-url]
+[![coverage][codecov-image]][codecov-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][npm-badge-png]][package-url]
 
 parse argument options
 
@@ -96,3 +103,15 @@ npm install minimist
 # license
 
 MIT
+
+[package-url]: https://npmjs.org/package/minimist
+[npm-version-svg]: https://versionbadg.es/minimistjs/minimist.svg
+[npm-badge-png]: https://nodei.co/npm/minimist.png?downloads=true&stars=true
+[license-image]: https://img.shields.io/npm/l/minimist.svg
+[license-url]: LICENSE
+[downloads-image]: https://img.shields.io/npm/dm/minimist.svg
+[downloads-url]: https://npm-stat.com/charts.html?package=minimist
+[codecov-image]: https://codecov.io/gh/minimistjs/minimist/branch/main/graphs/badge.svg
+[codecov-url]: https://app.codecov.io/gh/minimistjs/minimist/
+[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/minimistjs/minimist
+[actions-url]: https://github.com/minimistjs/minimist/actions