* switch to composer for qrcode and otp dependencies

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

vendor/thecodingmachine/safe/generated/uopz.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Safe;
+
+use Safe\Exceptions\UopzException;
+
+/**
+ * Makes class extend parent
+ *
+ * @param string $class The name of the class to extend
+ * @param string $parent The name of the class to inherit
+ * @throws UopzException
+ *
+ */
+function uopz_extend(string $class, string $parent): void
+{
+    error_clear_last();
+    $result = \uopz_extend($class, $parent);
+    if ($result === false) {
+        throw UopzException::createFromPhpError();
+    }
+}
+
+
+/**
+ * Makes class implement interface
+ *
+ * @param string $class
+ * @param string $interface
+ * @throws UopzException
+ *
+ */
+function uopz_implement(string $class, string $interface): void
+{
+    error_clear_last();
+    $result = \uopz_implement($class, $interface);
+    if ($result === false) {
+        throw UopzException::createFromPhpError();
+    }
+}