message: fix: library builder
diff: "prefix": "x",
  "architect": {
  "build": {
  - "builder": "@angular-devkit/build-ng-packagr:build",
  + "builder": "@angular-devkit/build-angular:ng-packagr",
  "options": {
  "tsConfig": "projects/ng-chartist/tsconfig.lib.json",
  "project": "projects/ng-chartist/ng-package.json"
  