cgrep-6.4: dependencies

Dependencies for cgrep-6.4

cgrep	ansi-terminal (>=0.5) array (>=0.4) base (>=4.6 && <4.7) bytestring (>=0.10) cmdargs (>=0.10) containers (>=0.5) directory (>=1.2) dlist (>=0.3) filepath (>=1.3) ghc-prim (>=0.3) regex-posix (>=0.90) safe (>=0.3) split (>=0.2) stm (>=2.1) stringsearch (>=0.3) unordered-containers (>=0.1)