factor-1.6: dependencies

Dependencies for factor-1.6

library	base (>=4.0 && <5.0) containers (>=0.5.7.1) parsec (>=3.1) pretty (>=1.1) random (>=1.0.1.1) time (>=1.6.0.1)
factor	base (>=4.0 && <5.0) containers (>=0.5.7.1) parsec (>=3.1) pretty (>=1.1) random (>=1.0.1.1) time (>=1.6.0.1)