Fix styling

Author: seisman

pygmt/params/pattern.py

@@ -5,8 +5,8 @@
 import dataclasses
 
 from pygmt.alias import Alias
-from pygmt.params.base import BaseParam
 from pygmt.exceptions import GMTValueError
+from pygmt.params.base import BaseParam
 
 
 @dataclasses.dataclass(repr=False)