Sort alias list alphetically

Author: yvonnefroehlich

pygmt/src/coast.py

@@ -17,21 +17,21 @@
 
 @fmt_docstring
 @use_alias(
-    R="region",
-    J="projection",
     A="area_thresh",
-    C="lakes",
     B="frame",
+    C="lakes",
     D="resolution",
     E="dcw",
+    F="box",
+    G="land",
     I="rivers",
+    J="projection",
     L="map_scale",
-    F="box",
     N="borders",
-    W="shorelines",
-    G="land",
+    R="region",
     S="water",
     V="verbose",
+    W="shorelines",
     c="panel",
     p="perspective",
     t="transparency",