Dockerfile: use newer version of luajson
Dockerfile: use newer version of luajson

Former-commit-id: 2ad30a4a363812f778e25b5a1431e5f769eb235f [formerly 2b374b44fa49cab18e3cc6f6fc0425796bee3bcd]
Former-commit-id: f184f800003d54c7deedbc1cb9f85166de94285a
torhve/ivar2,torhve/ivar2,haste/ivar2,torhve/ivar2