Require commonmark 0.2.1.

pandoc.cabal

@@ -451,7 +451,7 @@ library
                  bytestring            >= 0.9      && < 0.12,
                  case-insensitive      >= 1.2      && < 1.3,
                  citeproc              >= 0.4.0.1  && < 0.4.1,
-                 commonmark            >= 0.2      && < 0.3,
+                 commonmark            >= 0.2.1    && < 0.3,
                  commonmark-extensions >= 0.2.1.2  && < 0.3,
                  commonmark-pandoc     >= 0.2.1    && < 0.3,
                  connection            >= 0.3.1,

stack.yaml

@@ -14,7 +14,7 @@ extra-deps:
 - random-1.2.0
 - unicode-collation-0.1.3
 - citeproc-0.4.0.1
-- commonmark-0.2
+- commonmark-0.2.1
 - commonmark-extensions-0.2.1.2
 - commonmark-pandoc-0.2.1
 ghc-options: