refactor: re-export get_suffixes from executables module (#128)

* don't break back-compatibility

Author: wpbonelli

modflow_devtools/executables.py

@@ -2,6 +2,11 @@
 from types import SimpleNamespace
 from typing import Dict
 
+from modflow_devtools.misc import get_suffixes
+
+# re-export for backwards-compatibility (used to be here)
+get_suffixes = get_suffixes
+
 
 class Executables(SimpleNamespace):
     """