Update Readme

Author: toroidal-code

README.md

@@ -1,39 +1,35 @@
 # C++Spec 
-[![version](https://img.shields.io/badge/version-v0.0.0-blue.svg)]()
+[![license](https://img.shields.io/badge/license-MIT-blue)](https://choosealicense.com/licenses/mit/)
 [![GitHub Action](https://github.com/toroidal-code/cppspec/actions/workflows/test.yml/badge.svg)]() 
 [![GitHub release](https://img.shields.io/github/release/toroidal-code/cppspec.svg)](https://github.com/toroidal-code/cppspec/releases/latest) 
-[![Github Releases](https://img.shields.io/github/downloads/toroidal-code/cppspec/latest/total.svg)]() 
 [![Documentation Status](https://readthedocs.org/projects/cppspec/badge/?version=latest)](http://cppspec.readthedocs.org/en/latest/?badge=latest)
 
 A behavior-driven development testing library for C++ with an RSpec-inspired DSL.
 
-## Warning! This is pre-release software and may be incomplete, contain bugs, and/or introduce major breaking changes within a short period of time
+## Documentation
 
-## Installation ##
-
-C++Spec will be released as a single collated header-file that can be placed in any include path in your project. After that, all features are available via `#include "cppspec.hpp"`.
-
-If you want to use the git repo for development or to integrate it into your own
-project as a submodule, releases will also be available as tags. This project's
-include folder should then be added to your project's include path. Again, all
-functionality is exposed through `#include "cppspec.hpp"`.
-
-If you want to manually generate the collated `cppspec.hpp` yourself, you can download the ccollate tool [here](https://github.com/toroidal-code/ccollate/master/ccollate.rb) and then run `./ccollate.rb include/cppspec.hpp > cppspec.hpp` in the 
-toplevel directory of the C++Spec repo. A fully-featured `cppspec.hpp` file 
-will then be available in the root of the project for usage.
+See [http://cppspec.readthedocs.org/](http://cppspec.readthedocs.org/) for full documentation and a tutorial.
 
+## Requirements
 
-## Documentation ##
+C++Spec requires a compiler and standard library with support for C++20.
 
-See [http://cppspec.readthedocs.org/](http://cppspec.readthedocs.org/) for full documentation and a tutorial.
+__Note:__ Only the tests require being compiled with C++20 support (`-std=c++20`). No other part of an existing project's build must be modified.
 
-## Requirements ##
+## Usage
+The recommended usage is as a subproject integrated into your build system. For CMake this would look something like below:
+```cmake
+FetchContent_Declare(
+  c++spec
+  GIT_REPOSITORY https://github.com/toroidal-code/cppspec
+  GIT_TAG        VERSION
+)
 
-C++Spec requires a compiler with support for C++11 and polymorphic lambda expressions from C++14. This includes GCC >= 4.9, MSVCC >= 14.0, or clang >= 3.4. For other compilers check [this chart](http://en.cppreference.com/w/cpp/compiler_support).
-
-__Note:__ Only the tests require being compiled with C++14 support (`-std=c++14`). No other part of an existing project's build must be modified.
+# Or using CPM
+CPMAddPackage("gh:toroidal-code/cppspec@VERSION")
+```
 
-## Introduction ##
+## Introduction
 
 If you've ever used RSpec or Jasmine, chances are you'll be familiar with C++Spec's syntax. For example, this is a C++Spec version of the first snippet on RSpec's [README](https://github.com/rspec/rspec-core/blob/master/README.md#basic-structure).
 
@@ -58,22 +54,16 @@ describe order_spec("Order", $ {
   });
 });
 
-
-int main(){
-  return CppSpec::Runner(CppSpec::Formatters::verbose)
-             .add_spec(order_spec)
-             .exec() ? EXIT_SUCCESS : EXIT_FAILURE;
-}
-
+CPPSPEC_MAIN(order_spec);
 ```
 
-## FAQ ##
+## FAQ
 
-## Attribution ##
+## Attribution
 Heavily inspired by [RSpec](https://github.com/rspec) and [Jasmine](http://jasmine.github.io).
 
-## Authors ##
-Copyright © 2014-2016 Katherine Whitlock
+## Authors
+Copyright © 2014-2024 Katherine Whitlock
 
-## License ##
+## License
 The project is licensed under the MIT License.