Add comprehensive tests for role middleware and fix package dependencies

node_modules/@sinonjs/samsam/lib/is-set.js

@@ -0,0 +1,14 @@
+"use strict";
+
+/**
+ * Returns `true` when the argument is an instance of Set, `false` otherwise
+ *
+ * @alias module:samsam.isSet
+ * @param  {*}  val - A value to examine
+ * @returns {boolean} Returns `true` when the argument is an instance of Set, `false` otherwise
+ */
+function isSet(val) {
+    return (typeof Set !== "undefined" && val instanceof Set) || false;
+}
+
+module.exports = isSet;