message: match version with semantic version in current cli
  remove core-js as it was in angular v1.7.x
diff: "rxjs": "6.6.3",
  "tslib": "2.0.3",
  "zone.js": "0.11.2",
  - "core-js": "3.6.5",
  "fs-extra": "9.0.1"
  },
  "devDependencies": {
  "@angular-devkit/build-angular": "0.1002.0",
  - "@angular/cli": "10.0.0",
  + "@angular/cli": "10.2.0",
  "@angular/compiler-cli": "10.2.0",
  "@angular/language-service": "10.2.0",
  - "@types/node": "14.0.14",
  - "@types/jasmine": "3.5.11",
  + "@types/node": "12.19.3",
  + "@types/jasmine": "3.5.14",
  "@types/jasminewd2": "2.0.8",
  "codelyzer": "6.0.1",
  "jasmine-core": "3.6.0",
  - "jasmine-spec-reporter": "6.0.0",
  - "karma": "5.2.3",
  + "jasmine-spec-reporter": "5.0.2",
  + "karma": "5.0.9",
  "karma-chrome-launcher": "3.1.0",
  "karma-coverage-istanbul-reporter": "3.0.3",
  "karma-jasmine": "4.0.1",
  "karma-jasmine-html-reporter": "1.5.4",
  "protractor": "7.0.0",
  - "ts-node": "9.0.0",
  + "ts-node": "8.3.0",
  "tslint": "6.1.3",
  "typescript": "4.0.5"
  },
  