title: ArrowNotImplementedError: halffloat error on applying pandas.to_feather on a dataframe
body: <p>I have a dataframe with columns of different datatypes including dates. No after doing some modifications, i want to save it a feather file so as to access it later. But i am getting the error on the following step</p>
  
  <pre><code>historical_transactions.to_feather('tmp/historical-raw')
  
  ArrowNotImplementedError: halffloat
  </code></pre>