fix(@angular/cli): don't remove scripts from package.json

This was dropped because we used to have postinstall scripts that
we did not want to use on npm. We don't anymore, so there's no
use in removing those scripts.

lib/packages.ts

@@ -59,11 +59,11 @@ function loadPackageJson(p: string) {
       case 'private':
       case 'workspaces':
       case 'resolutions':
+      case 'scripts':
         continue;
 
       // Remove the following keys from the package.json.
       case 'devDependencies':
-      case 'scripts':
         delete pkg[key];
         continue;