build: use specific engines for built packages

Author: filipesilva

lib/packages.ts

@@ -114,6 +114,14 @@ function loadPackageJson(p: string) {
         pkg[key] = b;
         break;
 
+      // Overwrite engines to a common default.
+      case 'engines':
+        pkg['engines'] = {
+          'node': '>= 8.9.0',
+          'npm': '>= 5.5.1',
+        };
+        break;
+
       // Overwrite the package's key with to root one.
       default:
         pkg[key] = root[key];

packages/angular/cli/package.json

@@ -19,10 +19,6 @@
     "type": "git",
     "url": "https://github.com/angular/angular-cli.git"
   },
-  "engines": {
-    "node": ">= 8.9.0",
-    "npm": ">= 5.5.1"
-  },
   "author": "Angular Authors",
   "license": "MIT",
   "bugs": {

packages/angular_devkit/schematics_cli/package.json

@@ -13,10 +13,6 @@
     "code generation",
     "schematics"
   ],
-  "engines": {
-    "node": ">= 8.9.0",
-    "npm": ">= 5.5.1"
-  },
   "dependencies": {
     "@angular-devkit/core": "0.0.0",
     "@angular-devkit/schematics": "0.0.0",

packages/ngtools/webpack/package.json

@@ -20,10 +20,6 @@
     "url": "https://github.com/angular/angular-cli/issues"
   },
   "homepage": "https://github.com/angular/angular-cli/tree/master/packages/@ngtools/webpack",
-  "engines": {
-    "node": ">= 8.9.0",
-    "npm": ">= 5.5.1"
-  },
   "dependencies": {
     "@angular-devkit/core": "0.0.0",
     "rxjs": "6.2.2",