Add comprehensive tests for role middleware and fix package dependencies

node_modules/@sinonjs/samsam/lib/create-matcher/is-iterable.js

@@ -0,0 +1,16 @@
+"use strict";
+
+var typeOf = require("@sinonjs/commons").typeOf;
+
+/**
+ * Returns `true` for iterables
+ *
+ * @private
+ * @param {*} value A value to examine
+ * @returns {boolean} Returns `true` when `value` looks like an iterable
+ */
+function isIterable(value) {
+    return Boolean(value) && typeOf(value.forEach) === "function";
+}
+
+module.exports = isIterable;