PHPCS urls and supported version (#140)

* Wrap the --stdin-path argument in double quotes

Fixes an issue with spaces in file/directory paths

Closes #136

* Update link to PHPCS repo

Closed #118

.gitignore

@@ -4,3 +4,4 @@ out
 node_modules
 .vscode-test/
 *.vsix
+.idea/

README.md

@@ -5,7 +5,11 @@
 ![GitHub issues](https://img.shields.io/github/issues-raw/valeryan/vscode-phpsab)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
 
-This linter plugin for [Visual Studio Code](https://code.visualstudio.com/) provides an interface to [phpcs & phpcbf](http://pear.php.net/package/PHP_CodeSniffer/). It will be used with files that have the “PHP” language mode. This extension is designed to use auto configuration search mechanism to apply rulesets to files within a workspace. This is useful for developers who work with many different projects that have different coding standards.
+This linter plugin for [Visual Studio Code](https://code.visualstudio.com/) provides an interface to [phpcs & phpcbf](https://github.com/PHPCSStandards/PHP_CodeSniffer). It will be used with files that have the “PHP” language mode. This extension is designed to use auto configuration search mechanism to apply rulesets to files within a workspace. This is useful for developers who work with many different projects that have different coding standards.
+
+## PHPCS Version Support
+
+This extension supports the [latest stable version of PHPCS](https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/). If you are using an older version of PHPCS, please upgrade to the latest version.
 
 ## Maintenance Status