updated packages

vendor/vlucas/phpdotenv/src/Environment/VariablesInterface.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Dotenv\Environment;
+
+use ArrayAccess;
+
+/**
+ * This environment variables interface.
+ */
+interface VariablesInterface extends ArrayAccess
+{
+    /**
+     * Determine if the environment is immutable.
+     *
+     * @return bool
+     */
+    public function isImmutable();
+
+    /**
+     * Tells whether environment variable has been defined.
+     *
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function has($name);
+
+    /**
+     * Get an environment variable.
+     *
+     * @param string $name
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return string|null
+     */
+    public function get($name);
+
+    /**
+     * Set an environment variable.
+     *
+     * @param string      $name
+     * @param string|null $value
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function set($name, $value = null);
+
+    /**
+     * Clear an environment variable.
+     *
+     * @param string $name
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function clear($name);
+}