Update dependencies to the latest version, update to ESLint 9

Author: rtivital

.eslintignore

@@ -0,0 +1,17 @@
+// @ts-check
+
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  {
+    rules: {
+      '@typescript-eslint/no-var-requires': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-require-imports': 'off',
+    },
+  },
+  { ignores: ['**/*.{mjs,cjs,js,d.ts,d.mts}'] }
+);

.eslintrc.js

@@ -8,29 +8,29 @@
     "postcss": ">=8.0.0"
   },
   "dependencies": {
-    "postcss-mixins": "^9.0.4",
-    "postcss-nested": "^6.0.1"
+    "postcss-mixins": "^11.0.3",
+    "postcss-nested": "^7.0.2"
   },
   "devDependencies": {
+    "@eslint/js": "^9.23.0",
     "@types/fs-extra": "^11",
-    "@types/jest": "^29.5.2",
-    "@types/node": "^20.3.1",
-    "@types/postcss-mixins": "^9.0.0",
+    "@types/jest": "^29.5.14",
+    "@types/node": "^22.13.14",
+    "@types/postcss-mixins": "^9.0.6",
     "@types/signale": "^1",
-    "@typescript-eslint/eslint-plugin": "^5.60.0",
-    "@typescript-eslint/parser": "^5.60.0",
-    "eslint": "^8.43.0",
-    "esno": "^4.0.0",
-    "execa": "^8.0.1",
-    "fs-extra": "^11.2.0",
-    "jest": "^29.5.0",
-    "postcss": "^8.4.24",
-    "prettier": "^2.8.8",
+    "eslint": "^9.23.0",
+    "esno": "^4.8.0",
+    "execa": "^9.5.2",
+    "fs-extra": "^11.3.0",
+    "jest": "^29.7.0",
+    "postcss": "^8.5.3",
+    "prettier": "^3.5.3",
     "signale": "^1.4.0",
-    "simple-git": "^3.21.0",
-    "ts-jest": "^29.1.0",
+    "simple-git": "^3.27.0",
+    "ts-jest": "^29.3.0",
     "tsc": "^2.0.4",
-    "typescript": "^5.1.3",
+    "typescript": "^5.8.2",
+    "typescript-eslint": "^8.28.0",
     "version-next": "^1.0.2"
   },
   "scripts": {