Migrate to ESMBundler and node 24 (#345)

jest.config.mjs

@@ -0,0 +1,12 @@
+import { createDefaultEsmPreset } from "ts-jest";
+
+const preset = createDefaultEsmPreset();
+
+/** @type {import('jest').Config} */
+export default {
+  ...preset,
+  collectCoverageFrom: ["src/**/*.ts", "!src/**/*.d.ts"],
+  moduleFileExtensions: ["ts", "js", "mjs"],
+  testEnvironment: "node",
+  testMatch: ["<rootDir>/__tests__/**/*.test.ts"],
+};