title: Error in farver using color palettes for leaflet in R
body: <p>The color palette for leaflet is not working in linux. The error is farver related. Using the exact same example for leaflet from <a href="https://rstudio.github.io/leaflet/colors.html" rel="nofollow noreferrer">RStudio</a>:</p>
  <pre><code>    # Call the color function (colorNumeric) to create a new palette function
  pal &lt;- colorNumeric(c(&quot;red&quot;, &quot;green&quot;, &quot;blue&quot;), 1:10)
  </code></pre>
  <p>Returns this error on linux <em>but not</em> on windows:</p>
  <pre><code>Error in farver::decode_colour(colors, alpha = TRUE, to = &quot;lab&quot;, na_value = &quot;transparent&quot;) : 
        unused argument (na_value = &quot;transparent&quot;)
  </code></pre>
  <p>I've updated all packages, look a bit into the source code for the farver package, but I'm at a loss as to why this works in windows and not linux. Seems like a <em>very</em> straight forward piece of code.</p>