title: package ‘mapdata’ was built under R version 4.0.4
body: <p>I was trying to make an excercise and I was using &quot;climatol&quot; package but when I tried to install it, two messages appeared and both said that &quot;was built under R version 4.0.4 &quot; in &quot;maps&quot; and &quot;mapdata&quot;... Are they similar packages or how can I update them or what can I do?</p>