fix: add test for validation

Author: niieani

src/index.test.ts

@@ -0,0 +1,8 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import {validate} from '.'
+
+test('imports', () => {
+  expect(() =>
+    ((validate as unknown) as any)(undefined, undefined, undefined, 'file.ts'),
+  ).toThrow()
+})