message: build: update the package.json to 10.2.0-next.0
  When the rc was cut for 10.1.0-rc.0, the package.json for master should be updated
  to to the following next version, in this case 10.2.0-next.0.
diff: {
  "name": "angular-srcs",
  - "version": "10.1.0-rc.0",
  + "version": "10.2.0-next.0",
  "private": true,
  "description": "Angular - a web framework for modern web apps",
  "homepage": "https://github.com/angular/angular",
  