Add comprehensive tests for role middleware and fix package dependencies

node_modules/just-extend/README.md

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+<!-- DO NOT EDIT THIS FILE! THIS FILE WAS AUTOGENERATED BY TEMPLATE-MATE -->
+<!-- SEE https://github.com/angus-c/just/blob/master/CONTRIBUTING.md#readme-template -->
+
+## just-extend
+
+Part of a [library](https://anguscroll.com/just) of zero-dependency npm modules that do just do one thing.
+Guilt-free utilities for every occasion.
+
+[`🍦 Try it`](https://anguscroll.com/just/just-extend)
+
+```shell
+npm install just-extend
+```
+```shell
+yarn add just-extend
+```
+
+Extend an object
+
+```js
+import extend from 'just-extend';
+
+var obj = {a: 3, b: 5};
+extend(obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8}
+obj; // {a: 4, b: 5, c: 8}
+
+var obj = {a: 3, b: 5};
+extend({}, obj, {a: 4, c: 8}); // {a: 4, b: 5, c: 8}
+obj; // {a: 3, b: 5}
+
+var arr = [1, 2, 3];
+var obj = {a: 3, b: 5};
+extend(obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]}
+arr.push(4);
+obj; // {a: 3, b: 5, c: [1, 2, 3, 4]}
+
+var arr = [1, 2, 3];
+var obj = {a: 3, b: 5};
+extend(true, obj, {c: arr}); // {a: 3, b: 5, c: [1, 2, 3]}
+arr.push(4);
+obj; // {a: 3, b: 5, c: [1, 2, 3]}
+
+extend({a: 4, b: 5}); // {a: 4, b: 5}
+extend({a: 4, b: 5}, 3); {a: 4, b: 5}
+extend({a: 4, b: 5}, true); {a: 4, b: 5}
+extend('hello', {a: 4, b: 5}); // throws
+extend(3, {a: 4, b: 5}); // throws
+```