Use dev version of citeproc.

cabal.project

@@ -24,3 +24,8 @@ source-repository-package
   type: git
   location: https://github.com/jgm/ipynb.git
   tag: 00246af10885c2ad4413ace4f69a7e6c88297a08
+
+source-repositiory-package
+  type: git
+  location: https://github.com/jgm/citeproc.git
+  tag: 81f8a77b7378f3e7305fb0ea1554e9a4726d4ade

stack.yaml

@@ -30,7 +30,6 @@ extra-deps:
 - pandoc-lua-marshal-0.1.3
 - pandoc-types-1.22.1
 - commonmark-0.2.1.1
-- citeproc-0.6
 - aeson-pretty-0.8.9
 - unicode-transforms-0.4.0
 - unicode-data-0.2.0
@@ -38,6 +37,8 @@ extra-deps:
   commit: 46df85d747f4f233157d3476683264232a4f58be
 - git: https://github.com/jgm/ipynb.git
   commit: 00246af10885c2ad4413ace4f69a7e6c88297a08
+- git: https://github.com/jgm/citeproc.git
+  commit: 81f8a77b7378f3e7305fb0ea1554e9a4726d4ade
 - git: https://github.com/jgm/commonmark-hs
   commit: a60de5bb3d9905d0bc9d833e5df643f1130076b2
   subdir: commonmark-pandoc
@@ -49,3 +50,5 @@ ghc-options:
 resolver: lts-18.10
 nix:
   packages: [zlib]
+
+