feat: convert package to ESM-only

.github/workflows/release.yml

@@ -6,6 +6,14 @@ name: Release
       - next
       - beta
       - "*.x"
+
+# These are recommended by the semantic-release docs: https://github.com/semantic-release/npm#npm-provenance
+permissions:
+  contents: write # to be able to publish a GitHub release
+  issues: write # to be able to comment on released issues
+  pull-requests: write # to be able to comment on released pull requests
+  id-token: write # to enable use of OIDC for npm provenance
+
 jobs:
   release:
     name: release

index.js

@@ -1,14 +1,13 @@
-const ProbotExports = require("probot");
-const lambdaFunction = require("./lambda-function");
+import lambdaFunction from "./lambda-function";
 
-module.exports = { ...ProbotExports, createLambdaFunction };
+export * from "probot";
 
 /**
  *
  * @param {import('probot').ApplicationFunction} app
  * @param { { probot: import('probot').Probot } } options
  */
-function createLambdaFunction(app, { probot }) {
+export function createLambdaFunction(app, { probot }) {
   // load app once outside of the function to prevent double
   // event handlers in case of container reuse
   probot.load(app);

lambda-function.js

@@ -1,7 +1,7 @@
-module.exports = lambdaFunction;
+export default lambdaFunction;
 
-const lowercaseKeys = require("lowercase-keys");
-const { template } = require("./views/probot");
+import lowercaseKeys from "lowercase-keys";
+import { template } from "./views/probot.js";
 
 async function lambdaFunction(probot, event, context) {
   if (event.httpMethod === "GET" && event.path === "/probot") {