update to v2.3.0

add `.rep()` & `.replaceChildren()` function
update `.app()` & `.append()` to support rest params
update build target to ES6
fix comment color on demo page
add (more) tests

package.json

@@ -1,6 +1,6 @@
 {
   "name": "fluent-dom-esm",
-  "version": "2.2.1",
+  "version": "2.3.0",
   "description": "",
   "license": "WTFPL",
   "exports": {