fix parentheses in DESC

Author: sbgraves237

DESCRIPTION

@@ -6,9 +6,9 @@ Authors@R: c(person(given = "Yves",
                   family = "Croissant",
                   role = c("aut", "cre"),
                   email = "yves.croissant@let.ish-lyon.cnrs.fr), 
-             person(given = 'Spencer', 
-                  family = 'Graves', 
-                  role = c('aut', 'ctb'), 
+             person(given = "Spencer", 
+                  family = "Graves", 
+                  role = c("aut", "ctb"), 
                   email = "spencer.graves@effectivedefense.org"))
 Author: Yves Croissant <yves.croissant@let.ish-lyon.cnrs.fr> and Spencer Graves 
 Maintainer: Spencer Graves <spencer.graves@effectivedefense.org>