[meta] add safe-publish-latest, auto-changelog

.npmrc

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

package.json

@@ -4,6 +4,9 @@
 	"description": "Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.",
 	"main": "index.js",
 	"scripts": {
+		"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)\")\"",
+		"prepublish": "safe-publish-latest",
 		"pretest": "npm run lint",
 		"lint": "eslint .",
 		"tests-only": "node test",
@@ -33,11 +36,20 @@
 	"homepage": "https://github.com/inspect-js/is-map#readme",
 	"devDependencies": {
 		"@ljharb/eslint-config": "^15.0.1",
+		"auto-changelog": "^1.16.2",
 		"es5-shim": "^4.5.13",
 		"es6-shim": "^0.35.5",
 		"eslint": "^6.6.0",
 		"for-each": "^0.3.3",
 		"object-inspect": "^1.7.0",
+		"safe-publish-latest": "^1.1.4",
 		"tape": "^4.11.0"
+	},
+	"auto-changelog": {
+		"output": "CHANGELOG.md",
+		"template": "keepachangelog",
+		"unreleased": false,
+		"commitLimit": false,
+		"backfillLimit": false
 	}
 }