Use AggregateError if available

Author: benjie

src/index.ts

@@ -17,7 +17,9 @@ export function toe<TData extends Record<string, any>>(result: {
         "Invalid call to graphql-toe; neither data nor errors were present",
       );
     } else {
-      throw errors[0];
+      throw typeof AggregateError === "undefined"
+        ? errors[0]
+        : new AggregateError(errors, errors[0].message);
     }
   }
   if (!errors || errors.length === 0) {

tsconfig.json

@@ -1,6 +1,7 @@
 {
   "extends": "@tsconfig/recommended/tsconfig.json",
   "compilerOptions": {
+    "lib": ["es2021"],
     "declaration": true,
     "rootDir": "src",
     "declarationDir": "./dist",