change package to only produce esm

Author: jogibear9988

benchmark/index.mjs

@@ -1,7 +1,7 @@
 import * as fs from 'node:fs';
 import benchmark from 'benchmark';
 import bytes from 'bytes';
-import { parse } from '../dist/esm/adobe-css-tools.mjs';
+import { parse } from '../dist/index-min.js';
 
 const small = fs.readFileSync('benchmark/small.css', 'utf8');
 const large = fs.readFileSync('benchmark/large.css', 'utf8');

jest.config.js

@@ -0,0 +1,20 @@
+export default {
+  testMatch: ['**/?(*.)+(spec|test).+(mts|ts|tsx|mjs|js)'],
+  preset: 'ts-jest/presets/default-esm',
+  testEnvironment: 'node',
+
+  extensionsToTreatAsEsm: ['.ts', '.mts'],
+
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+
+  transform: {
+    '^.+\\.(mts|ts|tsx)$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+  },
+};