Switch module to ESM (#606)

Author: benjie

.prettierrc.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   trailingComma: "all",
   proseWrap: "always",
 };

RELEASE_NOTES.md

@@ -21,13 +21,18 @@ Read more:
 
 ## v0.18.0
 
+- Now published as pure ESM, but worry not as unflagged require(ESM) is now
+  enabled by default in
+  [Node 20.19.0+](https://nodejs.org/pt-br/blog/release/v20.19.0),
+  [Node 22.12.0+](https://nodejs.org/en/blog/release/v22.12.0) and Node 24+ so
+  everything should continue to work as before.
 - Since Node 20 is EOL, Node 22 is now the minimum supported version, per our
   [requirements documentation](https://worker.graphile.org/docs/requirements).
 - `Runner` gains `[Symbol.asyncDispose]()` method, so you can
   `await using runner = await run(...)` and the worker will be released when you
   reach the end of the scope. (Primarily useful for tests.)
 - Maintenance work: upgrade to latest TypeScript, Jest, eliminate ts-node, fix
-  yargs, use erasable syntax only for type-stripping support,
+  yargs, use erasable syntax only for type-stripping support.
 - `LogLevel` export is now type only - a string union rather than a TypeScript
   const enum.
 

__tests__/fixtures/blah.js __tests__/fixtures/blah.cjs__tests__/fixtures/blah.js renamed to __tests__/fixtures/blah.cjs

@@ -1,4 +1,4 @@
-const { rand } = require("../blah.js");
+const { rand } = require("../blah.cjs");
 module.exports = (_payload, helpers) => {
   helpers.logger.debug(rand());
   return "some sausages";

__tests__/fixtures/tasks/wouldyoulike.js __tests__/fixtures/tasks/wouldyoulike.cjs__tests__/fixtures/tasks/wouldyoulike.js renamed to __tests__/fixtures/tasks/wouldyoulike.cjs

@@ -1,6 +1,6 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-const blah_1 = require("../blah.js");
+const blah_1 = require("../blah.cjs");
 exports.default = (_payload, helpers) => {
   helpers.logger.debug((0, blah_1.rand)());
   return "some TS sausages";