Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Allows running specs within Docker container
`crystal spec` commands now supports JUnit XML output, which requires libxml2 to be installed. With current defaults, the command fails due missing `libxml2-dev` dependencies in the image. This change ensures `libxml2-dev` is installed along the other dependencies so can be used for both building executables and running specs. Also includes `libyaml-dev` so any attempt to using `yaml` works out of the box.