fix: implementa correções para conformidade

Implementa as correções necessárias para conformidade do módulo com padrões do WordPress.

refs: #74 #75 #76 #77

Author: andrekutianski

Gruntfile.js

@@ -1,4 +1,6 @@
-module.exports = function(grunt) {
+module.exports = grunt => {
+	require('load-grunt-tasks')(grunt);
+
 	grunt.initConfig({
 		pkg: grunt.file.readJSON('package.json'),
 
@@ -33,6 +35,4 @@ module.exports = function(grunt) {
 			}
 		}
 	});
-
-	require('load-grunt-tasks')(grunt);
-}
+};

composer.json

@@ -37,6 +37,15 @@
 	"require-dev": {
 		"phpunit/phpunit": "^7.5.20",
 		"phpunit/php-code-coverage": "^6.1.4",
-		"friends-of-phpspec/phpspec-code-coverage": "^4.3"
+		"friends-of-phpspec/phpspec-code-coverage": "^4.3",
+		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.2",
+		"phpcompatibility/php-compatibility": "^9.3",
+		"wp-coding-standards/wpcs": "^2.3"
+	},
+	"config": {
+		"allow-plugins": {
+			"composer/installers": true,
+			"dealerdirect/phpcodesniffer-composer-installer": true
+		}
 	}
 }