Update cmark-gfm to 0.28.3.gfm.19

Of course right after I did that last update, they released two more new
versions of cmark-gfm, so here we go again.

The .18 update defaults to "safe" mode, but I want to disable that and
leave sanitization up to Bleach, so this required changing the options.

salt/salt/cmark-gfm.sls

@@ -3,8 +3,8 @@ unpack-cmark-gfm:
     - name: /tmp/cmark-gfm
     - source:
       - salt://cmark-gfm.tar.gz
-      - https://github.com/github/cmark-gfm/archive/0.28.3.gfm.17.tar.gz
-    - source_hash: sha256=101ccfcd4f0fd8b05c20994006d992f2e81d6f96655afee4c66742ccc21f1f7d
+      - https://github.com/github/cmark-gfm/archive/0.28.3.gfm.19.tar.gz
+    - source_hash: sha256=d2c8cb255e227d07533a32cfd4a052e189f697e2a9681d8b17d15654259e2e4b
     - if_missing: /usr/local/lib/libcmark-gfm.so
     - options: --strip-components=1
     - enforce_toplevel: False

tildes/tildes/lib/cmark.py

@@ -7,9 +7,11 @@ from ctypes import CDLL, c_char_p, c_int, c_size_t, c_void_p
 CMARK_DLL = CDLL("/usr/local/lib/libcmark-gfm.so")
 CMARK_EXT_DLL = CDLL("/usr/local/lib/libcmark-gfm-extensions.so")
 
-# enables the --hardbreaks option for cmark
-# (can I import this? it's defined in cmark.h as CMARK_OPT_HARDBREAKS)
-CMARK_OPTS = 4
+# Enable the --hardbreaks and --unsafe options for cmark
+# Can we import these somehow? They're defined in cmark.h as:
+# CMARK_OPT_HARDBREAKS (1 << 2)
+# CMARK_OPT_UNSAFE (1 << 17)
+CMARK_OPTS = (1 << 2) | (1 << 17)
 
 CMARK_EXTENSIONS = (b"strikethrough", b"table")