message: updated clean script
diff: "esnext": "./esm/index.js",
  "scripts": {
  "lint": "yarn tslint --project .",
  - "clean": "yarn shx rm -rf umd esm esm5",
  + "clean": "yarn shx rm -rf dist output",
  "test": "yarn test:build && yarn test:run",
  "test:build": "tsc --build tsconfig.test.json",
  "test:run": "mocha -r tsconfig-paths/register --timeout 200000 output/tests/**/*.spec.js",
  