remove preversion, fix "lerna run build" doc

Author: epicfaace

docs/contributing.md

@@ -56,7 +56,7 @@ The full report can be seen by opening `./coverage/lcov-report/index.html`.
 To release, run:
 
 ```bash
-lerna build
+lerna run build
 lerna version
 lerna publish
 git push --tags origin master

packages/core/package.json

@@ -13,7 +13,6 @@
  "lint": "eslint src test",
  "precommit": "lint-staged",
  "publish-to-npm": "npm run build && npm publish",
- "preversion": "npm run build && npm run cs-check && npm run lint",
  "start": "concurrently \"npm:build:* -- --watch\"",
  "tdd": "cross-env NODE_ENV=test mocha --require @babel/register --watch --require ./test/setup-jsdom.js test/**/*_test.js",
  "test": "cross-env BABEL_ENV=test NODE_ENV=test mocha --require @babel/register --require ./test/setup-jsdom.js test/**/*_test.js",

packages/playground/package.json

@@ -13,7 +13,6 @@
  "precommit": "lint-staged",
  "publish-to-gh-pages": "npm run build && gh-pages --dist build/",
  "publish-to-npm": "npm run build && npm publish",
- "preversion": "npm run build && npm run build && npm run cs-check && npm run lint",
  "start": "webpack-dev-server --open --config webpack.config.dev.js"
  },
  "lint-staged": {