message: Correct package description to say 'v4'
diff: "name": "@material-ui/pickers",
  "version": "3.2.6",
  "private": true,
  - "description": "React components, that implements material design pickers for material-ui v1",
  + "description": "React components, that implements material design pickers for material-ui v4",
  "main": "./src/index.ts",
  "module": "./src/index.ts",
  "keywords": [
  