servant-machines-0.15.1: dependencies

Dependencies for servant-machines-0.15.1

library	base (>=4.9 && <5) bytestring (>=0.10.8.1 && <0.12) machines (>=0.6.4 && <0.8) mtl (>=2.2.2 && <2.3) servant (>=0.15 && <0.20)