title: state.center package in R 3.5
body: <p>I'm currently using R 3.5 and I need a package state.center for my project. When I try installing it I get the following error message.</p>
  
  <pre><code>Warning in install.packages :
    package ‘state.center’ is not available (for R version 3.5.0)
  </code></pre>
  
  <p>Does anyone know how to get around it? (I'm looking for long and lat state data)</p>