Add comprehensive tests for role middleware and fix package dependencies

node_modules/decamelize/index.d.ts

@@ -0,0 +1,20 @@
+/**
+Convert a camelized string into a lowercased one with a custom separator: `unicornRainbow` → `unicorn_rainbow`.
+
+@param string - The camelcase string to decamelize.
+@param separator - The separator to use to put in between the words from `string`. Default: `'_'`.
+
+@example
+```
+import decamelize = require('decamelize');
+
+decamelize('unicornRainbow');
+//=> 'unicorn_rainbow'
+
+decamelize('unicornRainbow', '-');
+//=> 'unicorn-rainbow'
+```
+*/
+declare function decamelize(string: string, separator?: string): string;
+
+export = decamelize;