Add missing responseMode. (#29670)

Fix missing responseMode in Auth0LockAuthOption as changed in https://github.com/auth0/lock/pull/526

types/auth0-lock/index.d.ts

@@ -98,6 +98,7 @@ interface Auth0LockAuthOptions {
     params?: Auth0LockAuthParamsOptions;
     redirect?: boolean;
     redirectUrl?: string;
+    responseMode?: string;
     responseType?: string;
     sso?: boolean;
     audience?: string;