fix crash on name-only type table

Author: avivkeller

src/generators/jsx-ast/utils/createSignatureElements.mjs

@@ -42,7 +42,7 @@ export const parseListIntoProperties = (node, prefix = '') => {
       name = 'Returns';
     }
 
-    if (children[0].value?.trim() === '') {
+    if (children[0]?.value?.trim() === '') {
       // Remove any leading space
       children.shift();
     }