title: Formik - Use uppercase first letter field name in error messages
body: <p>Is it possible to use uppercase field names in Formik error messages without having to define your own custom error message for every field? I'm using react native.</p>
  
  <p>I have had to just name the Formik field values with capital letters but I would prefer not to do that.</p>
  
  <p>formik enhancer code with uppercase first letter field names:</p>
  
  <pre><code>const formikEnhancer = withFormik({
    validationSchema: Yup.object().shape({
      Name: Yup.string().required(),
      Brand: Yup.string().required(),
      GroceryStore: Yup.object()
        .shape({
          city: Yup.string(),
          latitude: Yup.number(),
          longitude: Yup.number(),
          name: Yup.string(),
          place_id: Yup.string(),
          street: Yup.string(),
          street_number: Yup.string(),
          suburb: Yup.string()
        })
        .required(),
      Image: Yup.object().shape({
        uri: Yup.string(),
        name: Yup.string(),
        type: Yup.string()
      }),
      Categories: Yup.array()
        .min(1, 'Please select at least 1 Category')
        .required(),
      Description: Yup.string()
        .min(9)
        .required(),
      Price: Yup.string().matches(
        /^\d+(?:\.\d{2})$/,
        'Price must contain 2 decimal places (cents) e.g. 4.00'
      )
    }),
    isInitialValid: false,
    mapPropsToValues: () =&gt; ({
      Name: '',
      Brand: '',
      Description: '',
      Price: '',
      Categories: [],
      GroceryStore: {},
      Image: {}
    }),
    handleSubmit: (values, { props }) =&gt; {
      handleSubmit(values, props)
    },
    displayName: 'AddGroceryItemView'
  })(AddGroceryItemView)
  </code></pre>