title: Formik handling state with array of objects
body: <p>I'm newly using Formik library for forms and I ran into problem. I'm not sure how can I handle state with array of objects from inside the component. I know about <code>setValues</code> and <code>setFieldValue</code> methods.. also about <code>FieldArray</code> but my target is to add newZone into newZones array when I click on add button and I don't want to render it. I want to customize rendering and place it under accordion.</p>
  <p>sandbox here: <a href="https://codesandbox.io/s/rough-haze-zdlw9?file=/src/App.js" rel="nofollow noreferrer">https://codesandbox.io/s/rough-haze-zdlw9?file=/src/App.js</a></p>
  <p>Will I need all custom handlers? Will I need to use local state inside component and then use <code>setFieldValue</code> to set state? Or can I somehow use <code>FieldArray</code> in there without rendering?</p>
  <p>Thank you</p>