[readme] update readme from default branch

readme.markdown

@@ -1,13 +1,15 @@
-# deep-equal
+# deep-equal <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
 
-Node's `assert.deepEqual() algorithm` as a standalone module.
+Node's `assert.deepEqual() algorithm` as a standalone module, that also works in browser environments.
 
-This module is around [5 times faster](https://gist.github.com/2790507)
-than wrapping `assert.deepEqual()` in a `try/catch`.
+It mirrors the robustness of node's own `assert.deepEqual` and is robust against later builtin modification.
 
-[![browser support](https://ci.testling.com/substack/node-deep-equal.png)](https://ci.testling.com/substack/node-deep-equal)
+[![github actions][actions-image]][actions-url]
+[![coverage][codecov-image]][codecov-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
 
-[![build status](https://secure.travis-ci.org/substack/node-deep-equal.png)](https://travis-ci.org/substack/node-deep-equal)
+[![npm badge][npm-badge-png]][package-url]
 
 # example
 
@@ -33,25 +35,39 @@ var deepEqual = require('deep-equal')
 
 ## deepEqual(a, b, opts)
 
-Compare objects `a` and `b`, returning whether they are equal according to a
-recursive equality algorithm.
+Compare objects `a` and `b`, returning whether they are equal according to a recursive equality algorithm.
 
 If `opts.strict` is `true`, use strict equality (`===`) to compare leaf nodes.
-The default is to use coercive equality (`==`) because that's how
-`assert.deepEqual()` works by default.
+The default is to use coercive equality (`==`) because that's how `assert.deepEqual()` works by default.
 
 # install
 
-With [npm](http://npmjs.org) do:
+With [npm](https://npmjs.org) do:
 
 ```
 npm install deep-equal
 ```
 
 # test
 
-With [npm](http://npmjs.org) do:
+With [npm](https://npmjs.org) do:
 
 ```
 npm test
 ```
+
+[package-url]: https://npmjs.org/package/deep-equal
+[npm-version-svg]: https://versionbadg.es/inspect-js/deep-equal.svg
+[deps-svg]: https://david-dm.org/inspect-js/node-deep-equal.svg
+[deps-url]: https://david-dm.org/inspect-js/node-deep-equal
+[dev-deps-svg]: https://david-dm.org/inspect-js/node-deep-equal/dev-status.svg
+[dev-deps-url]: https://david-dm.org/inspect-js/node-deep-equal#info=devDependencies
+[npm-badge-png]: https://nodei.co/npm/deep-equal.png?downloads=true&stars=true
+[license-image]: https://img.shields.io/npm/l/deep-equal.svg
+[license-url]: LICENSE
+[downloads-image]: https://img.shields.io/npm/dm/deep-equal.svg
+[downloads-url]: https://npm-stat.com/charts.html?package=deep-equal
+[codecov-image]: https://codecov.io/gh/inspect-js/node-deep-equal/branch/main/graphs/badge.svg
+[codecov-url]: https://app.codecov.io/gh/inspect-js/node-deep-equal/
+[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/node-deep-equal
+[actions-url]: https://github.com/inspect-js/node-deep-equal/actions