title: Image is not shown after it is selected from react-native-image-picker
body: <p>I am developing an app in which i need to upload an image from my phone, once i click upload gallery is shown and i am able to select the image but once the image is selected the image is not shown in image container i have used.</p>
  <p>my code</p>
  <p>This is selectImage Function</p>
  <pre><code>selectImage = () =&gt; {
          const options = {
              title: 'Select Profile Picture',
              storageOptions: {
                  skipBackup: true,
                  path: 'images',
              },
          };
          ImagePicker.showImagePicker(options, (response) =&gt; {
              console.log('Response = ', response);
              if (response.didCancel) {
                  console.log('User cancelled image picker');
              } else if (response.error) {
                  console.log('ImagePicker Error: ', response.error);
                  Alert.alert(response.error.toString())
              } else if (response.customButton) {
                  console.log('User tapped custom button: ', response.customButton);
              } else {
                  //let source = { uri: response.uri };
                  Alert.alert(response.uri)
                  let source = { uri: 'data:image/jpeg;base64,' + response.data };
                  this.setState({
                      imageSource: source,
                      data: response.data,
                  });
              }
          });
      } 
  </code></pre>
  <p>this is display code</p>
  <pre><code>&lt;Image source={this.state.imageSource} style={{ width: 200, height: 250 }} /&gt;
  
  </code></pre>
  <p><strong>No error is thrown.</strong></p>