title: How to increase the font size of label names
body: <p>I want to increase the font size of label names. I tried with <code>geom_label_repel(aes(label = names, label.size = 5), box.padding = unit(0.5, "lines"))</code> . But the size doesn't affect the labels.</p>
  
  <pre><code>ggplot(df, aes(x,y,label=names)) +
    geom_point(colour = "red", size = 3) +
    geom_smooth(method=lm, se=FALSE, colour = "blue") +
    geom_label_repel(aes(label = names, label.size = 5),
                     box.padding = unit(0.5, "lines")) +
    xlim(0,2.5) +
    ylim(0,2.5) +
    theme( plot.title=element_text(size=16,face="bold"),
           axis.text=element_text(size=18),
           axis.title=element_text(size=20,face="bold"))
  </code></pre>