In yaml-0.11, Text.Libyaml was split into the libyaml package. Hence,
as dhall-json imports that module, a libyaml dependency is needed when
yaml >= 0.11. This necessitates an automatic flag.
Allow to generare quoted scalars if needed via providing a custom encode
options to Data.Yaml.encodeWith. So far two corner cases from yaml
itself (an empty scalar, and special strings) are omitted in the
implementation.
This adds a new `Dhall.Test.Util.discover` utility for auto-generating
a `TestTree` from a directory tree. This simplifies keeping up to date
with changes to the standard test suite.
* Use lts-12
* Remove cache on fail and add workaround to fix build with stack
* Add dhall-lsp-server to lts-12
* Commenting out default stack.yaml
* Bump up megaparsec version
