feat: output ESM for NodeJS

BREAKING CHANGE: output ESM instead of CJS

README.md

@@ -48,8 +48,7 @@ Node
 Install with <code>npm install @octokit/endpoint</code>
 
 ```js
-const { endpoint } = require("@octokit/endpoint");
-// or: import { endpoint } from "@octokit/endpoint";
+import { endpoint } from "@octokit/endpoint";
 ```
 
 </td></tr>

package.json

@@ -1,6 +1,7 @@
 {
   "name": "@octokit/endpoint",
   "version": "0.0.0-development",
+  "type": "module",
   "publishConfig": {
     "access": "public"
   },
@@ -10,7 +11,7 @@
     "lint": "prettier --check '{scripts,src,test}/**/*' README.md package.json",
     "lint:fix": "prettier --write '{scripts,src,test}/**/*' README.md package.json",
     "pretest": "npm run -s lint",
-    "test": "jest --coverage"
+    "test": "NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" npx jest --coverage"
   },
   "repository": "github:octokit/endpoint.js",
   "keywords": [
@@ -22,7 +23,7 @@
   "author": "Gregor Martynus (https://github.com/gr2m)",
   "license": "MIT",
   "devDependencies": {
-    "@octokit/tsconfig": "^2.0.0",
+    "@octokit/tsconfig": "^3.0.0",
     "@types/jest": "^29.0.0",
     "@types/node": "^20.10.0",
     "esbuild": "^0.20.0",
@@ -36,7 +37,7 @@
   },
   "dependencies": {
     "@octokit/types": "^12.0.0",
-    "universal-user-agent": "^6.0.0"
+    "universal-user-agent": "^7.0.2"
   },
   "release": {
     "branches": [
@@ -71,11 +72,15 @@
     ]
   },
   "jest": {
+    "extensionsToTreatAsEsm": [
+      ".ts"
+    ],
     "transform": {
       "^.+\\.(ts|tsx)$": [
         "ts-jest",
         {
-          "tsconfig": "test/tsconfig.test.json"
+          "tsconfig": "test/tsconfig.test.json",
+          "useESM": true
         }
       ]
     },

scripts/build.mjs

@@ -43,7 +43,7 @@ async function main() {
       bundle: true,
       platform: "node",
       target: "node18",
-      format: "cjs",
+      format: "esm",
       ...sharedOptions,
     }),
     // Build an ESM browser bundle
@@ -74,10 +74,12 @@ async function main() {
       {
         ...pkg,
         files: ["dist-*/**", "bin/**"],
-        main: "dist-node/index.js",
-        browser: "dist-web/index.js",
-        types: "dist-types/index.d.ts",
-        module: "dist-src/index.js",
+        exports: {
+          ".": {
+            types: "./dist-types/index.d.ts",
+            import: "./dist-src/index.js",
+          },
+        },
         sideEffects: false,
       },
       null,

test/tsconfig.test.json

@@ -3,7 +3,6 @@
   "compilerOptions": {
     "emitDeclarationOnly": false,
     "noEmit": true,
-    "verbatimModuleSyntax": false,
     "allowImportingTsExtensions": true
   },
   "include": ["src/**/*"]