chore: Add another fan of docsify! (docsifyjs#280)

* Add another fan of docsify!

Thanks for such a great documentation tool!

* Update README.md

README.md

@@ -82,6 +82,7 @@ These projects are using docsify to generate their sites. Pull requests welcome
 | [Noty](http://ned.im/noty/) | A Dependency-free notification library |
 | [xTeko](https://docs.xteko.com/) | Addins framework for Pin 3.0 |
 | [vue2-datatable-component](https://github.com/OneWayTech/vue2-datatable) | The best Datatable for Vue.js 2.x which never sucks |
+| [Solidarity](https://infinitered.github.io/solidarity/) | Environment enforcer for your projects across machines. |
 
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