pretty-show-1.6: dependencies

Dependencies for pretty-show-1.6

library	array (>=0.2 && <2) base (>=4.4 && <4.7) filepath ghc-prim haskell-lexer (>=1 && <2) pretty (>=1 && <2)
ppsh	base (>=3 && <5) pretty-show (>=1.4.1)