title: Ag-grid - Is value parser ignored when having custom cell editor?
body: <p>I use ag-grid with Angular v7 and I am having some issues with value parser, which I wanted to use with custom cell editor.</p>
  
  <p>When I declare custom cell editor value parser seems to be simply ignored. I hardcoded it to always return the same value, no matter the params, and it does it - when I delete cellEditor from my column definition. Once there is custom editor declared, parser seems to no longer be working - it does not have any effect on saved value. It is not even called - I tried to log something in it and it is not visible in the console when a custom editor is there.</p>
  
  <p>Correct me if I'm wrong, but this is not expected behavior, or is it? Sine in docs value parser and setter are mentioned in Cell Editing article, so I assume they should be working together.</p>