Require commonmark-pandoc >= 0.2.2.1.

This fixes task lists with multiple paragraphs.

pandoc.cabal

@@ -453,7 +453,7 @@ library
                  citeproc              >= 0.4.0.1  && < 0.4.1,
                  commonmark            >= 0.2.1    && < 0.3,
                  commonmark-extensions >= 0.2.1.2  && < 0.3,
-                 commonmark-pandoc     >= 0.2.1    && < 0.3,
+                 commonmark-pandoc     >= 0.2.1.1  && < 0.3,
                  connection            >= 0.3.1,
                  containers            >= 0.4.2.1  && < 0.7,
                  data-default          >= 0.4      && < 0.8,

stack.yaml

@@ -8,6 +8,7 @@ packages:
 - '.'
 extra-deps:
 - commonmark-0.2.1
+- commonmark-pandoc-0.2.1.1
 - skylighting-core-0.10.5.2
 - skylighting-0.10.5.2
 - git: https://github.com/jgm/doctemplates