Make the latest version of pandoc available to sachs
As sachs is using pandoc for converting JATS XML to PDF (when --input-format is set to extyles), and JATS support was added to pandoc in v2, the latest version needs to be available in the PATH for sachs to call.
It probably makes sense to install the latest version of pandoc and pandoc-citeproc on the system using homebrew, keeping it independent from the version in the app bundle that Pressroom's already using.