singletons-base-3.1: dependencies

Dependencies for singletons-base-3.1

library	base (>=4.16 && <4.17) pretty singletons (==3.0.1) singletons-th (>=3.1 && <3.2) template-haskell (>=2.18 && <2.19) text (>=1.2) th-desugar (>=1.13 && <1.14)