Add ConstexprJS under Frameworks (#157)

Co-authored-by: Myles Braithwaite <[email protected]>

README.md

@@ -103,6 +103,7 @@ A static web site generator is an application that takes plain text files and co
 *   [Capro](https://github.com/xy2z/capro) - Flexible PHP8 static site generator, using Blade template engine. - `#PHP` `#Blade`
 *   [coil](https://github.com/badosu/coil) - `#elixir`
 *   [Complexity](http://complexity.readthedocs.org/en/latest/) - For those who like to work in HTML. - `#Python`
+*   [ConstexprJS](https://amokfa.github.io/posts/constexprjs.html) - Evaluate and struo JS in your website ahead of time. - `#JavaScript`
 *   [Cuttlebelle](https://cuttlebelle.com/) - The react static site generator that separates editing and code concerns. - `#JavaScript` `#Node.js` `#React.js`
 *   [Dewar](https://github.com/tfpk/dewar) - A flask-like static site generator. - `#Python`
 *   [Elder.js](https://elderguide.com/tech/elderjs/) - An opinionated, SEO focused, static site generator for Svelte.js. - `#JavaScript` `#Node.js` `#Svelte.js`