Angular 6 Migration -.angular-cli.json to angular.json

Most likely there were errors in one of those commands. For me, I had to run npm install -g @angular-devkit/core first and then run the commands:

npm install -g @angular/cli

npm install @angular/cli

In the console output of npm install @angular/cli you should see:

================================================================================
The Angular CLI configuration format has been changed, and your existing configuration can
be updated automatically by running the following command:

  ng update @angular/cli
================================================================================

Then you obviously should run ng update @angular/cli to finish off the process.

See the Official Update Guide for additional details.

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