message: chore(package.json): clear up intermidiate build artifact after build
diff: "build_es6": "npm-run-all clean_dist_es6 copy_src_es6 compile_module_es6",
  "build_es6_for_docs": "npm-run-all clean_dist_es6 copy_src_es6 compile_dist_es6_for_docs",
  "build_closure_core": "node ./tools/make-closure-core.js",
  - "build_global": "npm-run-all clean_dist_global build_es6 && mkdirp ./dist/global && node ./tools/make-umd-bundle.js && npm-run-all build_closure_core",
  + "build_global": "npm-run-all clean_dist_global build_es6 && mkdirp ./dist/global && node ./tools/make-umd-bundle.js && npm-run-all build_closure_core clean_dist_es6",
  "build_perf": "webdriver-manager update && npm-run-all build_cjs build_global perf",
  "build_test": "shx rm -rf ./dist/ && npm-run-all build_cjs clean_spec build_spec test_mocha",
  "build_cover": "shx rm -rf ./dist/ && npm-run-all build_cjs build_spec cover",
  - "build_docs": "npm-run-all build_global build_es6_for_docs build_cjs clean_spec build_spec tests2png decision_tree_widget && esdoc -c esdoc.json",
  + "build_docs": "npm-run-all build_global build_es6_for_docs build_cjs clean_spec build_spec tests2png decision_tree_widget && esdoc -c esdoc.json && npm-run-all clean_dist_es6",
  "build_spec": "tsc --project ./spec --pretty",
  "build_spec_browser": "webpack --config spec/support/webpack.mocha.config.js",
  "check_circular_dependencies": "madge ./dist/cjs --circular",
  