title: Export leaflet in png after having zoomed or moved the map
body: <p>I draw a classical leaflet map, in R.
  After moving or zooming the map, I wish to export it in PNG with <code>mapview::mapshot</code>.
  I'd like to export the newly zoomed map, not the original location.
  The export doesn't integrate the changes I did manually by drag-dropping</p>
  
  <pre><code>library(leaflet)
  library(tidyverse)
  leaflet() %&gt;% 
    addTiles() %&gt;%  
    setView(7.728,48.591,zoom = 17) 
  # I move and zoom manually the map
  mapshot(m, file = "dreal.jpg")
  </code></pre>
  
  <p>The PNG fig shows my original location, even if I zoomed all France, or moved to New Zealand.</p>