Include SConstruct in .editorconfig

.editorconfig

@@ -9,7 +9,7 @@ insert_final_newline = true
 [*.{cpp,hpp,c,h,mm}]
 trim_trailing_whitespace = true
 
-[{*.{py,cs},SCsub}]
+[{*.{py,cs},SConstruct,SCsub}]
 indent_style = space
 indent_size = 4