style: bump eslint to 9

eslint.config.mjs

@@ -0,0 +1,54 @@
+import eslint from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+	{
+		ignores: ['node_modules', '**/node_modules/**', '**/*.js', '**/*.d.ts']
+	},
+	eslint.configs.recommended,
+	...tseslint.configs.recommendedTypeChecked,
+	eslintPluginPrettierRecommended,
+	{
+		languageOptions: {
+			globals: {
+				...globals.node,
+				...globals.jest
+			},
+			ecmaVersion: 5,
+			sourceType: 'module',
+			parserOptions: {
+				project: ['tsconfig.json', 'tsconfig.build.json', 'tsconfig.spec.json'],
+				projectService: true,
+				tsconfigRootDir: import.meta.dirname
+			}
+		}
+	},
+	{
+		rules: {
+			'@typescript-eslint/no-explicit-any': 'off',
+			'@typescript-eslint/no-unsafe-assignment': 'off',
+			'@typescript-eslint/no-unsafe-call': 'off',
+			'@typescript-eslint/no-unsafe-member-access': 'off',
+			'@typescript-eslint/no-unsafe-function-type': 'off',
+			'@typescript-eslint/no-unsafe-argument': 'off',
+			'@typescript-eslint/no-unsafe-return': 'off',
+			'@typescript-eslint/no-unused-expressions': 'off',
+			'@typescript-eslint/no-require-imports': 'off',
+			'@typescript-eslint/no-unused-vars': 'off',
+			'@typescript-eslint/no-misused-promises': [
+				'error',
+				{
+					checksVoidReturn: false,
+					checksConditionals: false
+				}
+			],
+			'@typescript-eslint/require-await': 'off',
+			'@typescript-eslint/prefer-promise-reject-errors': 'off',
+			'@typescript-eslint/no-base-to-string': 'off',
+			'@typescript-eslint/unbound-method': 'off',
+			'@typescript-eslint/only-throw-error': 'off'
+		}
+	}
+);

package.json

@@ -47,18 +47,20 @@
 	"devDependencies": {
 		"@commitlint/cli": "19.6.1",
 		"@commitlint/config-angular": "19.7.0",
+		"@eslint/eslintrc": "^3.2.0",
+		"@eslint/js": "^9.18.0",
 		"@favware/npm-deprecate": "2.0.0",
 		"@nestjs/common": "10.4.15",
 		"@nestjs/core": "10.4.15",
 		"@nestjs/testing": "10.4.15",
 		"@types/jest": "29.5.14",
 		"@types/node": "22.10.7",
-		"@typescript-eslint/eslint-plugin": "5.62.0",
-		"@typescript-eslint/parser": "5.62.0",
 		"discord.js": "^14.16.2",
-		"eslint": "8.57.1",
+		"eslint": "^9.18.0",
 		"eslint-config-prettier": "10.0.1",
+		"eslint-plugin-import": "^2.31.0",
 		"eslint-plugin-prettier": "5.2.3",
+		"globals": "^15.14.0",
 		"husky": "9.1.7",
 		"jest": "29.7.0",
 		"lavalink-client": "^2.4.0",
@@ -71,14 +73,15 @@
 		"rxjs": "7.8.1",
 		"ts-jest": "29.2.5",
 		"ts-node": "10.9.2",
-		"typescript": "5.7.3"
+		"typescript": "5.7.3",
+		"typescript-eslint": "^8.21.0"
 	},
 	"peerDependencies": {
 		"@nestjs/common": "^10.2.0",
 		"@nestjs/core": "^10.2.0",
 		"discord.js": "^14.0.1",
-		"necord": "^6.0.0",
 		"lavalink-client": "^2.4.0",
+		"necord": "^6.0.0",
 		"reflect-metadata": "^0.2.1",
 		"rxjs": "^7.2.0"
 	}