Update the docker image of stack

Would fix the build error similar to commercialhaskell/stack#5445

Bump version to 0.3.0.1

Bump version to 0.3.0

Bump version to 0.2.1.0

Bump bounds, move to newer stack LTS

support servant-0.16, release 0.2.0.11

Add top-level binding type signature

Servant 015 plus release (MercuryTechnologies#71)

* relax servant & http-api-data versions

* release 0.2.0.9

update circleci base docker image

relax 'base' dependency, release 0.2.0.7 (MercuryTechnologies#66)