fix: add ECMAscript module

_Ideally_, we would just want to export it as ECMAscript module.

For now, to support both, we can use a shared JSON file.

It would be nice to use the `import cfg from "./config.js" assert { "json" };` but
that is experimental.

config.js

 // eslint-disable-next-line unicorn/prefer-module
-module.exports = {
-	plugins: [
-		'@semantic-release/commit-analyzer',
-		'@semantic-release/release-notes-generator',
-		'@semantic-release/changelog',
-		{
-			path: '@semantic-release/exec',
-			prepareCmd: 'npx prettier -w CHANGELOG.md',
-		},
-		'@semantic-release/bzlmod',
-		{
-			path: '@semantic-release/git',
-			assets: [
-				'MODULE.bazel',
-				'CHANGELOG.md',
-			],
-		},
-		{
-			path: '@semantic-release/bzlmod',
-			source: {
-				// eslint-disable-next-line no-template-curly-in-string
-				prefix: '${CI_PROJECT_NAME}-v${version}',
-				// eslint-disable-next-line no-template-curly-in-string
-				archive: '${CI_PROJECT_NAME}-v${version}.tar.gz',
-				// eslint-disable-next-line no-template-curly-in-string
-				url: '${CI_PROJECT_URL}/-/releases/v${version}/downloads/src.tar.gz',
-			},
-		},
-		{
-			path: '@semantic-release/gitlab',
-			assets: [
-				{
-					path: 'MODULE.bazel',
-					label: 'MODULE.bazel',
-					type: 'package',
-					// eslint-disable-next-line no-template-curly-in-string
-					filepath: '/modules/${env.CI_PROJECT_NAME}/${nextRelease.version}/MODULE.bazel',
-					target: 'generic_package',
-					status: 'hidden',
-				},
-				{
-					path: 'source.json',
-					label: 'source.json',
-					type: 'package',
-					// eslint-disable-next-line no-template-curly-in-string
-					filepath: '/modules/${env.CI_PROJECT_NAME}/${nextRelease.version}/source.json',
-					target: 'generic_package',
-					status: 'hidden',
-				},
-				{
-					path: 'icon.svg',
-					type: 'image',
-				},
-				{
-					// eslint-disable-next-line no-template-curly-in-string
-					path: '${env.CI_PROJECT_NAME}-v${nextRelease.version}.tar.gz',
-					// eslint-disable-next-line no-template-curly-in-string
-					label: '${env.CI_PROJECT_NAME}-v${nextRelease.version}.tar.gz',
-					type: 'package',
-					filepath: '/src.tar.gz',
-					target: 'generic_package',
-					status: 'hidden',
-				},
-				{
-					path: 'metadata.json',
-					label: 'metadata.json',
-					type: 'package',
-					// eslint-disable-next-line no-template-curly-in-string
-					filepath: '/modules/${env.CI_PROJECT_NAME}/metadata.json',
-					target: 'generic_package',
-					status: 'hidden',
-				},
-			],
-		},
-	],
-};
+const cfg = require('./config.json');
+
+// eslint-disable-next-line unicorn/prefer-module
+module.exports = cfg;

config.json

+{
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/changelog",
+    {
+      "path": "@semantic-release/exec",
+      "prepareCmd": "npx prettier -w CHANGELOG.md"
+    },
+    "@semantic-release/bzlmod",
+    {
+      "path": "@semantic-release/git",
+      "assets": ["MODULE.bazel", "CHANGELOG.md"]
+    },
+    {
+      "path": "@semantic-release/bzlmod",
+      "source": {
+        "prefix": "${CI_PROJECT_NAME}-v${version}",
+        "archive": "${CI_PROJECT_NAME}-v${version}.tar.gz",
+        "url": "${CI_PROJECT_URL}/-/releases/v${version}/downloads/src.tar.gz"
+      }
+    },
+    {
+      "path": "@semantic-release/gitlab",
+      "assets": [
+        {
+          "path": "MODULE.bazel",
+          "label": "MODULE.bazel",
+          "type": "package",
+          "filepath": "/modules/${env.CI_PROJECT_NAME}/${nextRelease.version}/MODULE.bazel",
+          "target": "generic_package",
+          "status": "hidden"
+        },
+        {
+          "path": "source.json",
+          "label": "source.json",
+          "type": "package",
+          "filepath": "/modules/${env.CI_PROJECT_NAME}/${nextRelease.version}/source.json",
+          "target": "generic_package",
+          "status": "hidden"
+        },
+        {
+          "path": "icon.svg",
+          "type": "image"
+        },
+        {
+          "path": "${env.CI_PROJECT_NAME}-v${nextRelease.version}.tar.gz",
+          "label": "${env.CI_PROJECT_NAME}-v${nextRelease.version}.tar.gz",
+          "type": "package",
+          "filepath": "/src.tar.gz",
+          "target": "generic_package",
+          "status": "hidden"
+        },
+        {
+          "path": "metadata.json",
+          "label": "metadata.json",
+          "type": "package",
+          "filepath": "/modules/${env.CI_PROJECT_NAME}/metadata.json",
+          "target": "generic_package",
+          "status": "hidden"
+        }
+      ]
+    }
+  ]
+}

config.mjs

+// eslint-disable-next-line import/order
+import {createRequire} from 'node:module';
+
+const require = createRequire(import.meta.url);
+const cfg = require('./config.json');
+
+export default cfg;

package.json

@@ -3,11 +3,14 @@
   "version": "0.0.0",
   "description": "A `semantic release` configuration for Bazel `MODULE.bazel` projects hosted on GitLab",
   "exports": {
+    "import": "./config.mjs",
     "require": "./config.js"
   },
   "main": "config.js",
+  "modules": "config.mjs",
   "files": [
-    "config.js"
+    "config.js",
+    "config.mjs"
   ],
   "scripts": {
     "lint": "xo",

test/integration.test.mjs

+import test from 'ava';
+
+test('Can load the ECMAscript module', async t => {
+	const {default: {plugins}} = await import('../config.mjs');
+
+	t.is(plugins.length, 8);
+});