Use latest citeproc. Closes #6783.

cabal.project

@@ -4,8 +4,8 @@ package pandoc
   flags: +embed_data_files -trypandoc
   ghc-options: -j +RTS -A64m -RTS
 
--- source-repository-package
---     type: git
---     location: https://github.com/jgm/citeproc
---     tag: 0.1.0.3
+source-repository-package
+    type: git
+    location: https://github.com/jgm/citeproc
+    tag: ac57c6ceb8fe6583921c5e3f3a3838401191b97c
 

stack.yaml

@@ -22,7 +22,8 @@ extra-deps:
 - commonmark-0.1.0.2
 - commonmark-extensions-0.2.0.1
 - commonmark-pandoc-0.2.0.1
-- citeproc-0.1.0.3
+- git: https://github.com/jgm/citeproc
+  commit: ac57c6ceb8fe6583921c5e3f3a3838401191b97c
 
 ghc-options:
    "$locals": -fhide-source-paths -Wno-missing-home-modules

test/command/6783.md

@@ -0,0 +1,26 @@
+```
+% pandoc -f markdown -t plain -s --citeproc
+---
+references:
+- author:
+  - family: Jupyter
+    given: Project
+  container-title: Proceedings of the 17th Python in Science Conference
+  id: 'ref-1'
+  issued: 2018
+  title: 'Binder 2.0 - Reproducible, interactive, sharable environments for science at scale'
+  type: 'paper-conference'
+  volume:
+...
+
+This is a test[@ref-1].
+^D
+
+
+This is a test(Jupyter 2018).
+
+Jupyter, Project. 2018. “Binder 2.0 - Reproducible, Interactive,
+Sharable Environments for Science at Scale.” In Proceedings of the 17th
+Python in Science Conference.
+```
+