build: update packages to fix github dependabot warnings

ESLint will be updated in a later version.

Author: BePo65

.github/dependabot.yml

@@ -5,3 +5,6 @@ updates:
   schedule:
     interval: monthly
   open-pull-requests-limit: 10
+  ignore:
+    - dependency-name: "eslint"
+      versions: ["9.x"]

.unimportedrc.json

@@ -35,6 +35,7 @@
     "projects/mat-datatable-lib/src/lib/mocking-data/mock-data.simple.ts"
   ],
   "ignoreUnused": [
+    "@angular/compiler",
     "material-icons",
     "roboto-fontface",
     "tslib"

README.md

@@ -1096,3 +1096,6 @@ Distributed under the MIT License. See `LICENSE` for more information.
 This project uses the fonts '[Roboto](https://fonts.google.com/specimen/Roboto/about)' and '[Material Icons](https://github.com/google/material-design-icons)' from the [Google Fonts Library](https://fonts.google.com/) that are licensed under the [Apache License Version 2.0](https://www.apache.org/licenses/LICENSE-2.0.txt).
 
 <p align="right">(<a href="#top">back to top</a>)</p>
+
+## Hints
+As `eslint` V9 requires a fundamental change to the configuration files, the update will be done in a later version.