v1.5.0-beta.4

Bug Fixes

• @angular/cli: support existing tsconfig.spec.json on Angular 5 (a5728d1)
• @angular/cli: update url-loader to 6.0 (776aee6)
• @ngtools/webpack: always emit on first build (e04a0d6), closes #7890

Features

• @angular/cli: add a bundle dependencies flag (ca22960), closes #7903
• @angular/cli: make appRoot customizable (2706ce2)
• @angular/cli: use eval-source-map for serve on dev targets (1ec8790)