chore(haskell): update base and add stack file

haskell/README.md

@@ -1,14 +1,19 @@
 # Haskell port of the Gilded-Rose Kata
 
-This is a Haskell port of the *Gilded-Rose-Kata*. For updates and pull-request
-on this haskell port go to https://github.com/sheyll/gilded-rose-haskell
+This is a Haskell port of the *Gilded-Rose-Kata*. 
+
+## Prerequisite
+
+If you don't have a recent Stack version installed in your system, follow the 
+[installation instructions](https://docs.haskellstack.org/en/stable/install_and_upgrade/) 
+for your operating system. 
 
 ## Building and Running
 
-Run `./install_deps.sh` initially, then `./test.sh` to execute the tests after
+Run `stack build` initially, then `stack test` to execute the tests after
 each refactoring.
 
-To execute the program run `./run.sh [days]` where `[days]` denotes an optional
+To execute the program run `stack run [days]` where `[days]` denotes an optional
 parameter for the number of days to simulate.
 
 Tests are in `test/GildedRoseSpec.hs`. Refer to http://hspec.github.io/ for