refactor: add phpstan and update code to adhere to level 5

- move and refactor Image.php from Libraries to Entities folder
- update some database field names
/ types
- update composer packages

app/Controllers/ActorController.php

@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace App\Controllers;
+
+use ActivityPub\Controllers\ActorController as ActivityPubActorController;
+use Analytics\AnalyticsTrait;
+
+class ActorController extends ActivityPubActorController
+{
+    use AnalyticsTrait;
+
+    protected $helpers = ['auth', 'svg', 'components', 'misc'];
+
+    public function follow()
+    {
+        // Prevent analytics hit when authenticated
+        if (!can_user_interact()) {
+            $this->registerPodcastWebpageHit($this->actor->podcast->id);
+        }
+
+        $cacheName = "page_podcast-{$this->actor->username}_follow";
+        if (!($cachedView = cache($cacheName))) {
+            helper(['form', 'components', 'svg']);
+            $data = [
+                'actor' => $this->actor,
+            ];
+
+            return view('podcast/follow', $data, [
+                'cache' => DECADE,
+                'cache_name' => $cacheName,
+            ]);
+        }
+
+        return $cachedView;
+    }
+}