[TASK] Update flag-icons and related build packages

This commit updates the `flag-icons` and its related build packages
`filesize` and `sharpen` to their respective latest version.

See changelog at [1].

Executed commands:

    npm install --save-dev \
        filesize@^10.1.0 \
        flag-icons@^7.1.0 \
        sharp@^0.33.1
    npm run build

[1] https://github.com/lipis/flag-icons/blob/v7.1.0/CHANGELOG.md

Resolves: #102780
Releases: main, 12.4
Change-Id: Ife74d3679d18ec374e40140183c69f912e5b1439
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82406
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>

Build/package.json

@@ -42,8 +42,8 @@
     "eslint": "^8.54.0",
     "eslint-plugin-lit": "^1.10.1",
     "eslint-plugin-wc": "^2.0.4",
-    "filesize": "^10.0.7",
-    "flag-icons": "^6.6.6",
+    "filesize": "^10.1.0",
+    "flag-icons": "^7.1.0",
     "grunt": "^1.6.1",
     "grunt-concurrent": "^3.0.0",
     "grunt-contrib-clean": "^2.0.1",
@@ -69,7 +69,7 @@
     "rollup-plugin-svg": "^2.0.0",
     "rollup-plugin-terser": "^7.0.2",
     "sass": "^1.62.0",
-    "sharp": "^0.32.0",
+    "sharp": "^0.33.1",
     "sinon": "^17.0.1",
     "stylelint": "^14.11.0",
     "stylelint-order": "^5.0.0",