feat: eslint 10 support (#677)

* feat: eslint 10 support

* fix: update eslint 10 to stable

Co-authored-by: Jonas Thelemann <e-mail+github@jonas-thelemann.de>

* chore: update `typescript-eslint`

* chore: minor bump for `eslint-plugin-eslint-plugin`

* chore: format

---------

Co-authored-by: Jonas Thelemann <e-mail+github@jonas-thelemann.de>

Author: astrochemx

.github/workflows/test.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        eslint-version: [8, 9]
+        eslint-version: [8, 9, 10]
     name: Test (Node 22, ESLint ${{ matrix.eslint-version }})
     steps:
       - name: Check out Git repository
@@ -18,15 +18,15 @@ jobs:
       - name: Install dependencies
         run: npm ci
       - name: Install ESLint ${{ matrix.eslint-version }}
-        run: npm i -D eslint@${{ matrix.eslint-version }}
+        run: npm i -D eslint@${{ matrix.eslint-version }} --legacy-peer-deps
       - name: Run tests
         run: |
-          if [ "${{ matrix.eslint-version }}" = "9" ]; then
-            npm run build && npm run spec -- --testPathIgnorePatterns="test/e2e-repo.spec.ts|test/flat-config-typing.spec.ts"
-          else
+          if [ "${{ matrix.eslint-version }}" = "8" ]; then
             npm test
+          else
+            npm run build && npm run spec -- --testPathIgnorePatterns="test/e2e-repo.spec.ts|test/flat-config-typing.spec.ts"
           fi
       - name: Run e2e tests
-        # Skip e2e tests for ESLint 9 due to API incompatibilities
-        if: matrix.eslint-version != '9'
+        # Skip e2e tests for ESLint 9+ due to API incompatibilities
+        if: matrix.eslint-version == '8'
         run: npm run spec:e2e

commitlint.config.js

@@ -18,6 +18,10 @@ module.exports = {
         "revert",
       ],
     ],
-    "subject-case": [2, "never", ["sentence-case", "start-case", "pascal-case", "upper-case"]],
+    "subject-case": [
+      2,
+      "never",
+      ["sentence-case", "start-case", "pascal-case", "upper-case"],
+    ],
   },
-};
+};

eslint.config.mjs

@@ -17,7 +17,7 @@ export default [
   includeIgnoreFile(gitignorePath),
   eslint.configs.recommended,
   ...tseslint.configs.recommended,
-  eslintPlugin.configs["flat/recommended"],
+  eslintPlugin.configs?.["flat/recommended"],
   compat.configs["flat/recommended"],
   eslintConfigPrettier,
   {