Add support for GFM in markdown of JSDoc

Examples: `csstype` has a bunch of tables.

Author: wooorm

lib/render.js

@@ -8,7 +8,9 @@
 import {ok as assert} from 'devlop'
 import {toString} from 'hast-util-to-string'
 import {fromMarkdown} from 'mdast-util-from-markdown'
+import {gfmFromMarkdown} from 'mdast-util-gfm'
 import {toHast} from 'mdast-util-to-hast'
+import {gfm} from 'micromark-extension-gfm'
 import {removePosition} from 'unist-util-remove-position'
 import {SKIP, visitParents} from 'unist-util-visit-parents'
 
@@ -294,7 +296,10 @@ export function query(state, annotation, between) {
 function createInfo(state, annotation) {
   /** @type {Root} */
   const tree = annotation.docs
-    ? fromMarkdown(annotation.docs)
+    ? fromMarkdown(annotation.docs, {
+        extensions: [gfm()],
+        mdastExtensions: [gfmFromMarkdown()]
+      })
     : {type: 'root', children: []}
   const tags = annotation.tags || []
   /** @type {List} */

package.json

@@ -40,7 +40,9 @@
     "devlop": "^1.0.0",
     "hast-util-to-string": "^3.0.0",
     "mdast-util-from-markdown": "^2.0.0",
+    "mdast-util-gfm": "^3.0.0",
     "mdast-util-to-hast": "^13.0.0",
+    "micromark-extension-gfm": "^3.0.0",
     "micromark-util-character": "^2.0.0",
     "twoslash": "^0.2.0",
     "unist-util-remove-position": "^5.0.0",