Update to 0.29.0.gfm.11

[anticomputer]

No description provided.

[kivikakk]

I've pushed a commit to fix the HtmlRenderer output no longer conforming to cmark-gfm, but there's one remaining failure which reflects a newly introduced bug in cmark-gfm:

  1) Failure:
TestPlaintext#test_to_commonmark [/Users/kivikakk/Code/commonmarker/test/test_plaintext.rb:30]:
--- expected
+++ actual
@@ -1,7 +1,7 @@
 "Hi there!

 1.  I am a numeric list.
-2.  I continue the list.
+3.  I continue the list.

   - Suddenly, an unordered list!
   - What fun!

Here's a repro on github/cmark-gfm@c4de252:

$ printf '1. Henlo\n2. Yep.\n3. Cool?\n' | build/src/cmark-gfm -t plaintext
1.  Henlo
3.  Yep.
5.  Cool?

The same is also present in CommonMark output from cmark-gfm. I'll open a PR.

[anticomputer]

We'll update (or close and replace) this PR with a series of fixes from cmark-gfm, including the list numbering issue, thanks for catching that @kivikakk

[phillmv]

I approve!