Update hast-to-hyperscript

Closes GH-57.

Reviewed-by: Titus Wormer <tituswormer@gmail.com>

Co-authored-by: Titus Wormer <tituswormer@gmail.com>

package.json

@@ -17,7 +17,7 @@
   ],
   "dependencies": {
     "@mapbox/hast-util-table-cell-style": "^0.1.3",
-    "hast-to-hyperscript": "^4.0.0",
+    "hast-to-hyperscript": "^5.0.0",
     "hast-util-sanitize": "^1.0.0",
     "mdast-util-to-hast": "^3.0.0"
   },

test/react/v0.14/fixtures/references/output.html

@@ -1,6 +1,6 @@
 <div><h1>References</h1>
 <p>Entities contains some serious entity tests relating to titles and links
 in definitions.</p>
-<p>However, the [missing], <a href="">missing</a>, and <a href="">missing</a> are omitted.</p>
-<p>However, the ![missing], <img src="" alt="missing"/>, and <img src="" alt="missing"/> are omitted.</p>
-<p>Same goes for <a href=""></a> and <img src=""/>.</p></div>
+<p>However, the [missing], [missing][], and [missing][missing] are omitted.</p>
+<p>However, the ![missing], ![missing][], and ![missing][missing] are omitted.</p>
+<p>Same goes for [][empty] and ![null][empty].</p></div>