Composer: update to YoastCS 3.2.0

Refs:
* https://github.com/Yoast/yoastcs/releases/tag/3.2.0
* https://github.com/PHPCSStandards/PHP_CodeSniffer/releases
* https://github.com/PHPCSStandards/phpcsutils/releases
* https://github.com/PHPCompatibility/PHPCompatibilityWP/releases
* https://github.com/automattic/VIP-Coding-Standards/releases
* https://github.com/sirbrillig/phpcs-variable-analysis/releases

Author: jrfnl

composer.json

@@ -30,7 +30,7 @@
 	"require-dev": {
 		"roave/security-advisories": "dev-master",
 		"yoast/wp-test-utils": "^1.2.0",
-		"yoast/yoastcs": "^3.1.0"
+		"yoast/yoastcs": "^3.2.0"
 	},
 	"autoload": {
 		"classmap": [