Use citeproc 0.3.0.3.

Fixes an issue in author-only citations when both an
author and translator are present.

pandoc.cabal

@@ -405,7 +405,7 @@ library
                  blaze-markup          >= 0.8      && < 0.9,
                  bytestring            >= 0.9      && < 0.12,
                  case-insensitive      >= 1.2      && < 1.3,
-                 citeproc              >= 0.3.0.2  && < 0.4,
+                 citeproc              >= 0.3.0.3  && < 0.4,
                  commonmark            >= 0.1.1.2  && < 0.2,
                  commonmark-extensions >= 0.2.0.4  && < 0.3,
                  commonmark-pandoc     >= 0.2      && < 0.3,

stack.yaml

@@ -17,7 +17,7 @@ extra-deps:
 - commonmark-extensions-0.2.0.4
 - commonmark-pandoc-0.2.0.1
 - doctemplates-0.9
-- citeproc-0.3.0.2
+- citeproc-0.3.0.3
 - texmath-0.12.1
 # - citeproc:
 #   git: https://github.com/jgm/citeproc.git