chore: new post-bump script

bump.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from 'bumpp'
 
 export default defineConfig({
-  execute: 'npx changelogen --output CHANGELOG.md && node -e "const fs=require(\'fs\'); const pkg=require(\'./package.json\'); let c=fs.readFileSync(\'CHANGELOG.md\',\'utf8\'); c=c.replace(/## v[\\d.]+...main/g, \'## v\' + pkg.version); fs.writeFileSync(\'CHANGELOG.md\', c);"',
+  execute: 'node scripts/post-bump.mjs',
   commit: true,
   tag: true,
   push: false,

scripts/post-bump.mjs

@@ -0,0 +1,24 @@
+import { execSync } from 'node:child_process';
+import { readFileSync, writeFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+const root = process.cwd();
+
+console.log('Generating changelog...');
+execSync('npx changelogen --output CHANGELOG.md', { stdio: 'inherit' });
+
+const pkgPath = resolve(root, 'package.json');
+const pkg = JSON.parse(readFileSync(pkgPath, 'utf8'));
+const version = pkg.version;
+
+const changelogPath = resolve(root, 'CHANGELOG.md');
+let content = readFileSync(changelogPath, 'utf8');
+
+const regex = /## v[\d.]+...main/g;
+if (regex.test(content)) {
+  console.log(`Fixing changelog header for v${version}...`);
+  content = content.replace(regex, `## v${version}`);
+  writeFileSync(changelogPath, content);
+}
+
+console.log('Post-bump script completed successfully.');