Add CHANGELOG.md, prep release command

Author: rdmurphy

CHANGELOG.md

@@ -0,0 +1,14 @@
+# 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).
+
+## [Unreleased]
+
+## [0.1.0] - 2019-07-27
+
+### Added
+
+- Initial release

package.json

@@ -17,6 +17,7 @@
     "build:babel": "babel-node --extensions \".ts\" src/cli.ts \"src/{cli,index}.ts\" --target=8 --output=dist --compress",
     "build:self": "node dist/cli.js \"src/{cli,index}.ts\" --target=8 --output=dist --compress",
     "build:types": "tsc --emitDeclarationOnly --outdir types --declaration --allowSyntheticDefaultImports src/{cli,index}.ts",
+    "release": "np",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {