package.json-after

{
  "name": "upgrade-to6",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.0.0-rc.6",
    "@angular/common": "^6.0.0-rc.6",
    "@angular/compiler": "^6.0.0-rc.6",
    "@angular/core": "^6.0.0-rc.6",
    "@angular/forms": "^6.0.0-rc.6 ",
    "@angular/http": "^6.0.0-rc.6",
    "@angular/platform-browser": "^6.0.0-rc.6",
    "@angular/platform-browser-dynamic": "^6.0.0-rc.6",
    "@angular/router": "^6.0.0-rc.6",
    "core-js": "^2.4.1",
    "rxjs": "^6.0.0",
    "rxjs-compat": "^6.0.0",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "^6.0.0-rc.8",
    "@angular/compiler-cli": "^6.0.0-rc.6",
    "@angular/language-service": "^6.0.0-rc.6",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2",
    "@angular-devkit/build-angular": "~0.5.11"
  }
}

package.json-before

{
  "name": "upgrade-to6",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.0",
    "@angular/common": "^5.2.0",
    "@angular/compiler": "^5.2.0",
    "@angular/core": "^5.2.0",
    "@angular/forms": "^5.2.0",
    "@angular/http": "^5.2.0",
    "@angular/platform-browser": "^5.2.0",
    "@angular/platform-browser-dynamic": "^5.2.0",
    "@angular/router": "^5.2.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.5.6",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "~1.7.4",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.5.3"
  }
}

script

$ node --version
$ npm uninstall -g @angular/cli && npm cache verify && npm i -g @angular/cli@next
update angular packages from ^5.2.0 to ^6.0.0-rc.6
update rxjs to ^6.0.0
add rxjs-compat ^6.0.0
update @angular/cli ^6.0.0-rc.8
update typescript ~2.7.2
$ npm i
$ ng update @angular/cli
$ npm start