title: Error when updating from angular 7 to Angular 8.0.0-beta.7 with ngx-bootstrap
body: <p>I am using ngx-bootstrap in my Angular 7 project and I wanted to update to 8.0.0-beta.7 just to check out the new version but I am getting an error from the ngx-bootstrap timepicker component</p>
  
  <pre><code>ERROR in node_modules/ngx-bootstrap/timepicker/models/index.d.ts(2,38): error TS2307: Cannot find module '@angular/forms/src/directives/control_value_accessor'.
  node_modules/ngx-bootstrap/timepicker/models/index.d.ts(3,22): error TS2307: Cannot find module '@angular/core/src/type'.
  </code></pre>
  
  <p>Is there any way I can do something about this so that I can check out the new Angular 8 Beta.</p>