raise CUDSS ver since cholesky requires recent fix

Author: hexaeder

Project.toml

@@ -86,7 +86,7 @@ ArrayInterface = "7.17"
 BandedMatrices = "1.8"
 BlockDiagonals = "0.2"
 CUDA = "5.5"
-CUDSS = "0.4, 0.6.1"
+CUDSS = "0.6.3"
 CUSOLVERRF = "0.2.6"
 ChainRulesCore = "1.25"
 CliqueTrees = "1.11.0"