Modules all the way

tasks/next-dev-version.js

@@ -1,7 +1,11 @@
-const version = require('../package.json').version;
-const semver = require('semver');
+import esMain from 'es-main';
+import process from 'process';
+import semver from 'semver';
+import {promises as fs} from 'fs';
 
-function nextVersion() {
+async function nextVersion() {
+  const pkg = await fs.readFile('../package.json', {encoding: 'utf8'});
+  const version = JSON.parse(pkg).version;
   const s = semver.parse(version);
   if (!s) {
     throw new Error(`Invalid version ${version}`);
@@ -9,6 +13,13 @@ function nextVersion() {
   return `${s.major}.${s.minor}.${s.patch}-dev.${Date.now()}`;
 }
 
-if (require.main === module) {
-  process.stdout.write(`${nextVersion()}\n`);
+if (esMain(import.meta)) {
+  nextVersion()
+    .then((version) => {
+      process.stdout.write(`${version}\n`);
+    })
+    .catch((error) => {
+      process.stderr.write(`${error}\n`);
+      process.exit(1);
+    });
 }