Issue/327 versioning (#345)

* Switch to semver format

* Rewrite new version check to use Github Releases and cron

* Styling

* Remove v from in front of version

* New version check test fix

* Uncomment test case

app/Cron/Nightly/NewVersionCheck.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Cron\Nightly;
+
+use App\Contracts\Listener;
+use App\Events\CronNightly;
+use App\Services\VersionService;
+
+/**
+ * Determine if any pilots should be set to ON LEAVE status
+ */
+class NewVersionCheck extends Listener
+{
+    private $versionSvc;
+
+    /**
+     * @param VersionService $versionSvc
+     */
+    public function __construct(VersionService $versionSvc)
+    {
+        $this->versionSvc = $versionSvc;
+    }
+
+    /**
+     * Set any users to being on leave after X days
+     *
+     * @param CronNightly $event
+     */
+    public function handle(CronNightly $event): void
+    {
+        $this->versionSvc->isNewVersionAvailable();
+    }
+}