Fix tests for new environments

[debug-ito]

I fixed package meta-data (hi.cabal and stack.yaml) to fix tests for new environments. I tested with stackage lts-12.26 and lts-14.7.

The diff is:

• stack.yaml: Upgrade the resolver.
• stack.yaml: Add "template" package to "extra-deps", because "template" package has been removed from stackage.
• hi.cabal doctests: Add "temporary" package to "build-depends" to fix build error.
• hi.cabal doctests: Remove modules about hspec from "other-modules" to fix build error. They are not necessary.

I'm not sure how to fix package.yaml, but probably we should fix it to match the change in hi.cabal.