Widen StateVar version bounds

Author: ekmett

GLUT.cabal

@@ -90,7 +90,7 @@ library
     array        >= 0.3  && < 0.6,
     containers   >= 0.3  && < 0.7,
     transformers >= 0.2  && < 0.6,
-    StateVar     >= 1.1  && < 1.2,
+    StateVar     >= 1.1  && < 1.3,
     OpenGL       >= 2.12 && < 3.1
   default-language: Haskell2010
   other-extensions: CPP