Make Optional origins setter non-null

Author: emlun

webauthn-server-core/src/main/java/com/yubico/webauthn/RelyingParty.java

@@ -593,7 +593,7 @@ public RelyingPartyBuilder origins(@NonNull Set<String> origins) {
       return this;
     }
 
-    public RelyingPartyBuilder origins(Optional<Set<String>> origins) {
+    public RelyingPartyBuilder origins(@NonNull Optional<Set<String>> origins) {
       this.origins = origins.orElse(null);
       return this;
     }

webauthn-server-core/src/main/java/com/yubico/webauthn/RelyingPartyV2.java

@@ -568,7 +568,7 @@ public RelyingPartyV2Builder<C> origins(@NonNull Set<String> origins) {
       return this;
     }
 
-    public RelyingPartyV2Builder<C> origins(Optional<Set<String>> origins) {
+    public RelyingPartyV2Builder<C> origins(@NonNull Optional<Set<String>> origins) {
       this.origins = origins.orElse(null);
       return this;
     }