Add comprehensive tests for role middleware and fix package dependencies

node_modules/@sinonjs/text-encoding/index.js

@@ -0,0 +1,9 @@
+// This is free and unencumbered software released into the public domain.
+// See LICENSE.md for more information.
+
+var encoding = require("./lib/encoding.js");
+
+module.exports = {
+  TextEncoder: encoding.TextEncoder,
+  TextDecoder: encoding.TextDecoder,
+};