Update to latest Stack lts version (5.9 -> 6.3)

Tested with `stack build`. It works.

diff --git a/stack.yaml b/stack.yaml
index c92c7ac26a9d3972c92e0770875b1b907f046465..b82f77e8331ffffebf85de5d53bc7494bed5a699 100644 (file)
--- a/stack.yaml
+++ b/stack.yaml
@@ -2,7 +2,7 @@
 # For more information, see: http://docs.haskellstack.org/en/stable/yaml_configuration/
 
 # Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
-resolver: lts-5.9
+resolver: lts-6.3
 
 # Local packages, usually specified by relative directory name
 packages: