Actualize stack.yaml
Actualize stack.yaml

1. Issue in serokell util has been fixed in 0.1.5.0.
2. wreq-0.5.0.0 is in LTS-8.5.

input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl