title: axlsx_rails gem: Columns width issue
body: <p>I'm using axlsx_rails gem to write in .xlsx file. I have multiple columns in spreadsheet based on form fields. It can vary. </p>
  
  <p>I would like to set the column width for all the columns based on data available.</p>
  
  <p>I have used:</p>
  
  <pre><code>col_widths= [10,20,30,40,50] 
  p = Axlsx::Package.new 
  p.use_autowidth = true
  wb = p.workbook
  wb.add_worksheet(:name =&gt; 'try') do |sheet|
  sheet.add_row ["hi","hello","how","are","you"]
  sheet.column_widths col_widths   ##this column widths method doesn't take an array.
  </code></pre>
  
  <p>Is is possible to pass an array to column_widths method or any other ways to convert col_widths array values to so that we can pass it to column_widths method?</p>
  
  <p>Thank you. </p>