cfg(Firebase): fix Firebase local serving (serve or emulators:start)

Due to a [breaking change][1] in Node.js v22, `superstatic`, the local
server used by Firebase `serve` and `emulators:start` commands throws an
error. See, also, [firebase/superstatic#468 (comment)][2] for details.

Apply a local patch to fix the issue, by accessing a property that is
defined on the `Stat` instance and thus will be available. We currently
do not need or use Firebase local serving, but I figured out the fix,
so... ¯\\\_(ツ)_/¯

[1]: nodejs/node#50908
[2]: firebase/superstatic#468 (comment)

Author: gkalpak

package-lock.json

@@ -79,7 +79,7 @@
     "eslint-import-resolver-typescript": "^3.6.1",
     "eslint-plugin-import": "^2.29.1",
     "eslint-plugin-jasmine": "^4.1.3",
-    "firebase-tools": "^13.10.2",
+    "firebase-tools": "^13.11.2",
     "hint": "^7.1.12",
     "jasmine-core": "^5.1.2",
     "karma": "^6.4.3",

package.json

@@ -0,0 +1,20 @@
+diff --git a/node_modules/superstatic/lib/providers/fs.js b/node_modules/superstatic/lib/providers/fs.js
+index 414d9fc..1975cd5 100644
+--- a/node_modules/superstatic/lib/providers/fs.js
++++ b/node_modules/superstatic/lib/providers/fs.js
+@@ -86,7 +86,14 @@ module.exports = function provider(options) {
+         try {
+             const stat = await multiStat(fullPathnames);
+             return {
+-                modified: stat.mtime.getTime(),
++                /*
++                 * [LOCAL-PATCH]
++                 * With Node.js v22, `mtime` is undefined, due to it being initially defined on `Stat.prototype`, which
++                 * means that the spread operator in `multiStat()` will not propagate it.
++                 * See, also, https://github.com/firebase/superstatic/issues/468#issuecomment-2166883064.
++                 */
++                //modified: stat.mtime.getTime(),
++                modified: Math.round(Number(stat.mtimeMs)),
+                 size: stat.size,
+                 etag: await fetchEtag(stat.pathname, stat),
+                 stream: fs.createReadStream(stat.pathname),