Add support reference-style links (#57)

E.g. `[#123][]` or `[@user1]`

Ref https://www.markdownguide.org/basic-syntax/#reference-style-links

dist/index.js

@@ -50351,10 +50351,12 @@ function extractChangeItems({ version }) {
 			throw new Error(`Not found version: ${version}`);
 		}
 
-		// Rewrite a link to a PR notation (#123) or a user mention (@username).
-		visit(list, 'link', (node, index, parent) => {
+		// Rewrite a link or reference to a PR notation (#123) or a user mention (@username).
+		visit(list, ['link', 'linkReference'], (node, index, parent) => {
 			if (index === undefined || parent === undefined) return CONTINUE;
 
+			if (!('children' in node)) return CONTINUE;
+
 			const [text] = node.children;
 			if (text?.type !== 'text') return CONTINUE;
 

src/__tests__/changelogToGithubRelease.test.js

@@ -6,6 +6,9 @@ import { changelogToGithubRelease } from '../changelogToGithubRelease.js';
 const changelog = `
 # Changelog
 
+## 1.2.0
+- reference-style link [#456][] ([@user1]).
+
 ## 1.1.0 - 2024-12-31
 - ddd [#123](https://github.com/foo/bar/pull/123) ([@user](https://github.com/user)).
 - eee.
@@ -16,26 +19,24 @@ const changelog = `
 
 ## 0.1.0
 - ccc.
+
+[#456]: https://github.com/foo/bar/pull/456
+[@user1]: https://github.com/user1
 `;
 
+test('rewrite change items including reference links', { only: true }, async () => {
+	const result = await changelogToGithubRelease(changelog, '1.2.0');
+	assert.equal(result, '* reference-style link #456 (@user1).\n');
+});
+
 test('rewrite change items for version with date in heading', async () => {
 	const result = await changelogToGithubRelease(changelog, '1.1.0');
-	assert.equal(
-		result,
-		`* ddd #123 (@user).
-* eee.
-`,
-	);
+	assert.equal(result, '* ddd #123 (@user).\n* eee.\n');
 });
 
 test('rewrite change items matching specified version', async () => {
 	const result = await changelogToGithubRelease(changelog, '1.0.0');
-	assert.equal(
-		result,
-		`* aaa #123 (@user).
-* bbb.
-`,
-	);
+	assert.equal(result, '* aaa #123 (@user).\n* bbb.\n');
 });
 
 test('raise an error when a specified version is not found', async () => {

src/changelogToGithubRelease.js

@@ -31,10 +31,12 @@ function extractChangeItems({ version }) {
 			throw new Error(`Not found version: ${version}`);
 		}
 
-		// Rewrite a link to a PR notation (#123) or a user mention (@username).
-		visit(list, 'link', (node, index, parent) => {
+		// Rewrite a link or reference to a PR notation (#123) or a user mention (@username).
+		visit(list, ['link', 'linkReference'], (node, index, parent) => {
 			if (index === undefined || parent === undefined) return CONTINUE;
 
+			if (!('children' in node)) return CONTINUE;
+
 			const [text] = node.children;
 			if (text?.type !== 'text') return CONTINUE;