copilot-c99-3.18: dependencies

Dependencies for copilot-c99-3.18

library	base (>=4.9 && <5) copilot-core (>=3.18 && <3.19) directory (>=1.3 && <1.4) filepath (>=1.4 && <1.5) language-c99 (>=0.2.0 && <0.3) language-c99-simple (>=0.3 && <0.4) mtl (>=2.2 && <2.4) pretty (>=1.1 && <1.2)