title: TextInput does not display keyboard
body: <p>Below is a simple program to get a <code>textInput</code> and display <code>textInput</code> as an <code>alert</code> when <code>Submit</code> button is tapped. the keyboard does not popup when I tap on textInput on Android simulator.</p>
  <pre class="lang-js prettyprint-override"><code>import React from 'react';
  import { Button, TextInput, SafeAreaView, ActivityIndicator,Text,alert } from 'react-native';
  import { Formik } from 'formik';
  
  export default() =&gt; (
    &lt;SafeAreaView style={{marginTop:90}}&gt;
    &lt;Formik
      initialValues={{name:''}}
      onSubmit={(values)=&gt;{alert(JSON.stringify(values));}}
    &gt;
     {formikProps=&gt;(
      &lt;React.Fragment&gt;
        &lt;TextInput style={{borderWidth:1,borderColor:&quot;black&quot;,padding:10, marginBottom:3}} placeholder='name' /&gt;
  
        &lt;Button title='submit' onPress={formikProps.handleSubmit} /&gt;
      &lt;/React.Fragment&gt;
     )}
    &lt;/Formik&gt;
    &lt;/SafeAreaView&gt;
  );
  </code></pre>