title: yii2 ActiveForm numeric textfield
body: <p>I've created an ActiveForm using yii2 like this:</p>
  
  <pre><code>                            &lt;?=$form-&gt;field($item, 'finalPrice', [
                                  'options' =&gt; [
                                      'tag' =&gt; 'div',
                                      'class' =&gt; '',
                                  ],
                                  'template' =&gt; '&lt;span class="col-md-2 col-lg-2"&gt;&lt;label class="control-label"&gt;Final item price&lt;/label&gt;{input}{error}&lt;/span&gt;'
                              ])-&gt;textInput([
                                   // ** i want numeric value **
                              ])-&gt;label(false)?&gt;
  </code></pre>
  
  <p>and it rendered a result of:</p>
  
  <pre><code>&lt;span class="col-md-2 col-lg-2"&gt;&lt;label class="control-label"&gt;Final item price&lt;/label&gt;&lt;input type="text" id="item-finalprice" class="form-control" name="Item[finalPrice]"&gt;&lt;p class="help-block help-block-error"&gt;&lt;/p&gt;&lt;/span&gt;
  </code></pre>
  
  <p>now i want to make it &lt; input type="number" ..   and not text.. (so user could change value using browser up/down buttons).  is there any way to do it? </p>