fix: Update ESLint v8 to v9 (#214)

.github/workflows/test.yml

@@ -12,14 +12,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
       - uses: actions/setup-node@v4
         with:
           node-version-file: ".node-version"
-          cache: "npm"
-      - run: npm ci
-      - run: npm audit signatures
-      - run: npm run build
-      - run: npm run test
+          cache: "pnpm"
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm run build
+      - run: pnpm run test
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
         with:

.husky/pre-commit

@@ -1 +1 @@
-npm run build
+pnpm run build

.prettierrc.json

@@ -1,3 +1 @@
-{
-  "semi": false
-}
+{}

CONTRIBUTING.md

@@ -18,14 +18,16 @@ Pull Requests are always welcome, but please discuss larger changes via issue be
 
 1. Fork the repository.
 1. Clone the fork to your local machine
-1. Install the dependencies with npm
-   `npm install`
+1. Enable corepack
+   `corepack enable`
+1. Install the dependencies with pnpm
+   `pnpm install`
 1. Create a new topic branch
    `git checkout -b fix/topic`
 1. Make changes
 1. Run build & test
-   `npm run build`
-   `npm run test`
+   `pnpm run build`
+   `pnpm run test`
 1. commit and push
    `git push -u origin HEAD`
 1. make a Pull Request.

eslint.config.mjs

@@ -0,0 +1,27 @@
+import eslintConfigLove from "eslint-config-love";
+import eslintPluginRegexp from "eslint-plugin-regexp";
+
+/**
+ * @type {import("eslint").Linter.Config[]}
+ */
+export default [
+  {
+    ...eslintConfigLove,
+    files: ["src/**/*.ts"],
+    rules: {
+      ...eslintConfigLove.rules,
+      // Tentatively changed from error to warn due to migration
+      "@typescript-eslint/consistent-type-assertions": "warn",
+      "@typescript-eslint/no-magic-numbers": "off",
+      "@typescript-eslint/no-unnecessary-condition": "warn",
+      "@typescript-eslint/strict-boolean-expressions": "warn",
+      "@typescript-eslint/prefer-nullish-coalescing": "warn",
+      "@typescript-eslint/prefer-destructuring": "warn",
+      "@typescript-eslint/no-base-to-string": "warn",
+    },
+  },
+  {
+    ...eslintPluginRegexp.configs["flat/recommended"],
+    files: ["src/**/*.ts"],
+  },
+];

jest.config.ts

@@ -193,4 +193,4 @@ export default {
 
   // Whether to use watchman for file crawling
   // watchman: true,
-}
+};