Update documentation

Author: Greg Bowler

.github/FUNDING.yml

@@ -0,0 +1,2 @@
+# These are supported funding model platforms
+github: [g105b]

README.md

@@ -21,15 +21,36 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - uses: php-actions/composer@v2 # or alternative dependency management
-    - uses: php-actions/phpstan@v1
+    - uses: php-actions/composer@v5 # or alternative dependency management
+    - uses: php-actions/phpstan@v2
     # ... then your own project steps ...
 ```
 
-Commands
---------
+Example
+-------
 
-By default, adding - uses: php-actions/phpstan@v1 into your workflow will run `phpstan analyse`, as `analyse` is the default command name.
+We've put together an extremely simple example application that uses `php-actions/phpstan`. Check it out here: https://github.com/php-actions/example-phpstan.
+
+Inputs
+------
+
+The following configuration options are available:
+
++ `version` The version of PHPUnit to use e.g. `9` or `9.5.0` (default: latest)
++ `php_version` The version of PHP to use e.g. `7.4` (default: latest)
++ `php_extensions` Space-separated list of extensions using [php-build][php-build] e.g. `xdebug mbstring` (default: N/A)
++ `command` The command to run e.g. `list` or `worker` (default: analyse)
++ `path` Path(s) with source code to run analysis on (required)
++ `configuration` Configuration file location
++ `level` Level of rule options - the higher, the stricter
++ `paths_file` Path to a file with a list of paths to run analysis on
++ `autoload_file` Project's additional autoload file path
++ `error_format` Format in which to print the result of the analysis
++ `generate_baseline` Path to a file where the baseline should be saved
++ `memory_limit` Memory limit for analysis
++ `args` Extra arguments to pass to the phpstan binary
+
+By default, adding - uses: php-actions/phpstan@v2 into your workflow will run `phpstan analyse`, as `analyse` is the default command name.
 
 You can issue custom commands by passing a command input, like so:
 
@@ -40,24 +61,11 @@ jobs:
     ...
 
     - name: PHPStan
-      uses: php-actions/phpstan@v1
+      uses: php-actions/phpstan@v2
       with:
         command: your-command-here
 ```
 
-Inputs
-------
-
-The following configuration options are available:
-
-+ `configuration` Path to the project configuration file
-+ `level` Level of rule options - the higher the stricter
-+ `paths_file` Path to a file with a list of paths to run analysis on
-+ `autoload_file` Project's additional autoload file path
-+ `error_format` Format in which to print the result of the analysis
-+ `generate_baseline` Path to a file where the baseline should be saved
-+ `memory_limit` Memory limit for analysis
-
 The syntax for passing in a custom input is the following:
 
 ```yaml
@@ -69,14 +77,30 @@ jobs:
     ...
 
     - name: PHPStan Static Analysis
-      uses: php-actions/phpstan@v1
+      uses: php-actions/phpstan@v2
       with:
         configuration: custom/path/to/phpstan.neon
         memory_limit: 256M
 ```
 
 If you require other configurations of phpstan, please request them in the [Github issue tracker](https://github.com/php-actions/phpstan/issues)
 
+PHP and PHPStan versions
+------------------------
+
+It's possible to run any version of PHPStan under any version of PHP, with any PHP extensions you require. This is configured with the following inputs:
+
++ `version` - the version number of PHPStan to run e.g. `0.12.63` (default: latest)
++ `php_version` - the version number of PHP to use e.g. `7.4` (default: latest)
++ `php_extensions` - a space-separated list of extensions to install using [php-build][php-build] e.g. `xdebug mbstring` (default: N/A)
+
+If you require a specific version combination that is not compatible with Github Actions for some reason, please make a request in the [Github issue tracker][issues].
+
+
+***
+
 If you found this repository helpful, please consider [sponsoring the developer][sponsor].
 
-[sponsor]: https://github.com/sponsors/g105b
+[php-build]: https://github.com/php-actions/php-build
+[issues]: https://github.com/php-actions/phpstan/issues
+[sponsor]: https://github.com/sponsors/g105b