update:2.0.2

Author: Peter

src/Attestation/AttestationObject.php

@@ -157,7 +157,7 @@ public function getCertificateSubject(): string
      * returns the key certificate in PEM format
      * @return string
      */
-    public function getCertificatePem(): string
+    public function getCertificatePem(): ?string
     {
         return $this->_attestationFormat->getCertificatePem();
     }

src/WebAuthn.php

@@ -18,7 +18,7 @@ class WebAuthn
     private string $_rpId;
     private string $_rpIdHash;
     private $_challenge;
-    private ?int $_signatureCounter;
+    private ?int $_signatureCounter = null;
     private $_caFiles;
     private $_formats;
     private $_androidKeyHashes;