Moved all ip-geolocation related stuff to its own module

module/IpGeolocation/src/GeoLite2/DbUpdaterInterface.php

@@ -0,0 +1,16 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\IpGeolocation\GeoLite2;
+
+use Shlinkio\Shlink\Common\Exception\RuntimeException;
+
+interface DbUpdaterInterface
+{
+    public function databaseFileExists(): bool;
+
+    /**
+     * @throws RuntimeException
+     */
+    public function downloadFreshCopy(?callable $handleProgress = null): void;
+}