Update ModuleCustomTrait.php

Adding an additional method call to allow the processing of the response from the get latest version request. With this it would be possible for me to query the version information directly from githubs release json without the need for an exta latest-release.txt file. Using the method I could easily parse the JSON response and extract the version information.

app/Module/ModuleCustomTrait.php

@@ -82,6 +82,18 @@ public function customModuleLatestVersionUrl(): string
         return '';
     }
 
+    /**
+     * Fetch the version information from the given content string.
+     * 
+     * @param string $content
+     *
+     * @return string
+     */
+    protected function extractVersion(string $content): string
+    {
+        return $content;
+    }
+
     /**
      * Fetch the latest version of this module.
      *
@@ -103,7 +115,7 @@ public function customModuleLatestVersion(): string
                 $response = $client->get($this->customModuleLatestVersionUrl());
 
                 if ($response->getStatusCode() === StatusCodeInterface::STATUS_OK) {
-                    $version = $response->getBody()->getContents();
+                    $version = $this->extractVersion($response->getBody()->getContents());
 
                     // Does the response look like a version?
                     if (preg_match('/^\d+\.\d+\.\d+/', $version)) {