feat: support cjs

esbuild/bundle.mjs

@@ -0,0 +1,31 @@
+import {build} from 'esbuild';
+import {TsconfigPathsPlugin} from '@esbuild-plugins/tsconfig-paths';
+import {nodeExternalsPlugin} from 'esbuild-node-externals';
+
+/** @type {import('esbuild').BuildOptions}*/
+const commonConfig = {
+    tsconfig: './tsconfig.json',
+    entryPoints: ['src/lib/index.ts'],
+    packages: 'external',
+    platform: 'neutral',
+    bundle: true,
+    plugins: [
+        // eslint-disable-next-line new-cap
+        TsconfigPathsPlugin({tsconfig: './tsconfig.json'}),
+        nodeExternalsPlugin(),
+    ],
+};
+
+const esmConfig = {
+    ...commonConfig,
+    outdir: 'build/esm',
+    format: 'esm',
+};
+
+const cjsConfig = {
+    ...commonConfig,
+    outdir: 'build/cjs',
+    format: 'cjs',
+};
+
+Promise.all([esmConfig, cjsConfig].map(build));