* switch to composer for qrcode and otp dependencies

* move most OTP-related stuff into userhelper
* remove old phpqrcode and otphp libraries

vendor/thecodingmachine/safe/lib/Exceptions/JsonException.php

@@ -0,0 +1,12 @@
+<?php
+
+
+namespace Safe\Exceptions;
+
+class JsonException extends \Exception implements SafeExceptionInterface
+{
+    public static function createFromPhpError(): self
+    {
+        return new self(\json_last_error_msg(), \json_last_error());
+    }
+}