domdiff update: do not use a fragment

This update is needed due bug
WebReflection/lighterhtml#50

The current domdiff version should be smaller, but also faster
in most common use cases, plus it might be able to solve
few quirks supporunding the <select> case.

package.json

@@ -152,7 +152,7 @@
     "@ungap/template-tag-arguments": "^0.3.0",
     "@ungap/weakmap": "^0.1.4",
     "disconnected": "^0.2.1",
-    "domdiff": "^2.0.3",
+    "domdiff": "^2.0.4",
     "domtagger": "^0.4.0",
     "hyperhtml-style": "^0.1.2",
     "hyperhtml-wire": "^2.1.0",