Update PHPUnit, run static analysis on tests

tests/Utils/CryptTraitTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace LeagueTests\Utils;
+
+use LeagueTests\Stubs\CryptTraitStub;
+use PHPUnit\Framework\TestCase;
+
+class CryptTraitTest extends TestCase
+{
+    /**
+     * @var \LeagueTests\Stubs\CryptTraitStub
+     */
+    protected $cryptStub;
+
+    public function setUp()
+    {
+        $this->cryptStub = new CryptTraitStub;
+    }
+
+    public function testEncryptDecrypt()
+    {
+        $payload = 'alex loves whisky';
+        $encrypted = $this->cryptStub->doEncrypt($payload);
+        $plainText = $this->cryptStub->doDecrypt($encrypted);
+
+        $this->assertNotEquals($payload, $encrypted);
+        $this->assertEquals($payload, $plainText);
+    }
+}