Reset select appearance in Safari (#222)

Co-authored-by: Yuhei Yasuda <[email protected]>

Author: jonathantneal

forms.css

@@ -17,6 +17,7 @@
  */
 
 :where(select) {
+  -webkit-appearance: none;
   appearance: none;
   background: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='4'%3E%3Cpath d='M4 0h6L7 4'/%3E%3C/svg%3E") no-repeat right center / 1em;
   border-radius: 0;