Update cmark to github/cmark-gfm@a2022f5

gjtorikian · gjtorikian · commit 31f4948d3cec · 2017-04-21T17:22:57.000-07:00
diff --git a/ext/commonmarker/cmark b/ext/commonmarker/cmark
@@ -1 +1 @@
-Subproject commit 96d24199df048f8df9aaf7a0e736bbb8d96f3573
+Subproject commit a2022f5de71150af7c76f8113a2aa058249d05f3
