Miscellaneous updates

composer.json

@@ -39,8 +39,14 @@
 		"predis/predis": "1.1.*",
 		"squizlabs/php_codesniffer": "^3.0.0@RC"
 	},
+	"scripts": {
+		"coverage": "vendor/bin/phpunit -c build",
+		"build": "vendor/bin/robo build",
+		"docs": "cd build && ../vendor/bin/phpdox && cd ..",
+		"test": "vendor/bin/phpunit"
+	},
 	"suggest": {
 		"monolog/monolog": "Provides implementation of psr/log",
 		"predis/predis": "Required for redis cache driver"
 	}
-}
+}

src/Json.php

@@ -31,7 +31,7 @@ class Json {
 	 * @param int   $depth
 	 * @return string
 	 */
-	public static function encode($data, $options = 0, $depth = 512)
+	public static function encode($data, $options = 0, $depth = 512): string
 	{
 		$json = json_encode($data, $options, $depth);
 		self::check_json_error();

src/Type/ArrayType.php

@@ -88,7 +88,7 @@ class ArrayType {
 	 * @param string $method
 	 * @param array  $args
 	 * @return mixed
-	 * @throws \InvalidArgumentException
+	 * @throws InvalidArgumentException
 	 */
 	public function __call(string $method, array $args)
 	{
@@ -97,8 +97,7 @@ class ArrayType {
 		{
 			$func = $this->nativeMethods[$method];
 			// Set the current array as the first argument of the method
-			array_unshift($args, $this->arr);
-			return call_user_func_array($func, $args);
+			return call_user_func($func, $this->arr, ...$args);
 		}
 
 		// Mapping for in-place methods
@@ -211,7 +210,10 @@ class ArrayType {
 	/**
 	 * Return a reference to the value of an arbitrary key on the array
 	 *
-	 * @param  array $key
+	 * @example $arr = new ArrayType([0 => ['data' => ['foo' => 'bar']]]);
+	 * $val = $arr->getDeepKey([0, 'data', 'foo']);
+	 * // returns 'bar'
+	 * @param  array $key An array of keys of the array
 	 * @return mixed
 	 */
 	public function &getDeepKey(array $key)

tests/JsonTest.php

@@ -65,4 +65,9 @@ class JsonTest extends Ion_TestCase {
 
 		Json::decode($badJson);
 	}
+
+	public function testDecodeNull()
+	{
+		$this->assertNull(Json::decode(NULL));
+	}
 }