chore!: Pure ESM package

https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

package.json

@@ -5,16 +5,15 @@
   "homepage": "https://replicache.dev",
   "repository": "github:rocicorp/replicache-react",
   "type": "module",
-  "main": "out/index.js",
-  "module": "out/index.mjs",
+  "module": "out/index.js",
+  "types": "out/index.d.ts",
+  "exports": "./out/index.js",
   "scripts": {
     "format": "prettier --write 'src/*.{js,jsx,json,ts,tsx,html,css,md}' '*.{cjs,js,jsx,json,ts,tsx,html,css,md}'",
     "check-format": "prettier --check 'src/*.{js,jsx,json,ts,tsx,html,css,md}' '*.{cjs,js,jsx,json,ts,tsx,html,css,md}'",
     "check-types": "tsc --noEmit",
     "lint": "eslint --ext .ts,.tsx,.js,.jsx src/",
-    "build-cjs": "tsc --module commonjs --outDir out",
-    "build-esm": "tsc --module ESNext --outDir out && mv out/index.js out/index.mjs",
-    "build": "npm run build-esm && npm run build-cjs",
+    "build": "tsc",
     "prepack": "npm run lint && npm run test && npm run build",
     "test": "web-test-runner \"src/**/*.test.{jsx,js,ts,tsx}\"",
     "test:watch": "npm test -- --watch"
@@ -48,7 +47,6 @@
   },
   "files": [
     "out/index.js",
-    "out/index.mjs",
     "out/index.d.ts"
   ]
 }

src/index.test.tsx

@@ -4,7 +4,7 @@ import React from 'react';
 import {render} from 'react-dom';
 import type {JSONValue, ReadTransaction} from 'replicache';
 import {Replicache, TEST_LICENSE_KEY, WriteTransaction} from 'replicache';
-import {Subscribable, useSubscribe} from './index';
+import {Subscribable, useSubscribe} from './index.js';
 
 function sleep(ms: number | undefined): Promise<void> {
   return new Promise(resolve => setTimeout(resolve, ms));

tsconfig.json

@@ -3,17 +3,17 @@
     "jsx": "react",
     "target": "ES2022",
     "isolatedModules": true,
-
+    "outDir": "out",
+    "module": "Node16",
     "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "esModuleInterop": true,
-
     "declaration": true,
     "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "node",
+    "moduleResolution": "Node16",
     "allowJs": true,
     "lib": ["dom", "esnext"],
     "skipLibCheck": true