title: Flutter - TextField "textAlign" property not found
body: <p>I have this basic textfield:</p>
  
  <pre><code>          new TextField(
              style: new TextStyle(fontSize: 20.0, color: Colors.blue),
              onChanged: (InputValue newInputValue) {
                setState(() {
                  inputValue = newInputValue;
              });
            }),
  </code></pre>
  
  <p>I now want to make the text float to the center when the user types something in. So I went to the docs and it told me to use the textAlign property.</p>
  
  <pre><code>              new TextField(
                  textAlign: TextAlign.center;
                  style: new TextStyle(fontSize: 20.0, color: Colors.blue),
                  onChanged: (InputValue newInputValue) {
                    setState(() {
                      inputValue = newInputValue;
                  });
                }),
  </code></pre>
  
  <p>But for some reason, Flutter tells me that the property TextAlign does not exist.</p>