title: @angular/forms and ng-packagr
body: <p>I have an angular module that imports the @angular/forms module. I publish with ng-packagr and when I import this angular module I get an error.</p>
  
  <p>Usually this error would be caused by not importing the formsModule. However, it's imported.</p>
  
  <p>Has anyone experienced this issue before or know what is causing it?</p>
  
  <pre><code>rejection: Error: StaticInjectorError(AppModule)[FormControl$1 -&gt; NgForm]: 
    StaticInjectorError(Platform: core)[FormControl$1 -&gt; NgForm]: 
      NullInjectorError: No provider for NgForm!
  </code></pre>