[meta] add auto-changelog

.npmrc

@@ -1 +1,3 @@
 package-lock=false
+allow-same-version=true
+message=v%s

CHANGELOG.md

@@ -1,3 +1,12 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+<!-- auto-changelog-above -->
+
 2.3.0 / 2023-02-04
 ==================
   * [New] add `--ignore-dirs` option to be used with `--multi`

package.json

@@ -12,6 +12,8 @@
 	"license": "MIT",
 	"scripts": {
 		"prepack": "npmignore --auto --commentLines=autogenerated",
+		"version": "auto-changelog && git add CHANGELOG.md",
+		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\"",
 		"prepublishOnly": "safe-publish-latest",
 		"prepublish": "not-in-publish || npm run prepublishOnly",
 		"pretest": "npm run --silent lint",
@@ -44,6 +46,7 @@
 	"devDependencies": {
 		"@ljharb/eslint-config": "^21.0.1",
 		"aud": "^2.0.2",
+		"auto-changelog": "^2.4.0",
 		"eslint": "=8.8.0",
 		"in-publish": "^2.0.1",
 		"make-arrow-function": "^1.2.0",
@@ -72,6 +75,15 @@
 	"engines": {
 		"node": ">= 0.4"
 	},
+	"auto-changelog": {
+		"output": "CHANGELOG.md",
+		"template": "keepachangelog",
+		"unreleased": false,
+		"commitLimit": false,
+		"backfillLimit": false,
+		"hideCredit": true,
+		"startingVersion": "2.3.1"
+	},
 	"publishConfig": {
 		"ignore": [
 			".github/workflows"