feat: add support for eslint v10

This change updates the version of eslint in our codebase to v10, and adds additional testing and typechecking in ci, running those steps on both v9 and v10.

Author: michaelfaith

.github/workflows/ci.yml

@@ -46,11 +46,14 @@ jobs:
       - uses: ./.github/actions/prepare
       - run: pnpm format --list-different
   test:
-    name: Test (Node.js ${{ matrix.node-version }}, ${{ matrix.os }})
+    name: Test (Node.js ${{ matrix.node-version }}, ESLint ${{ matrix.eslint-version }}, ${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
+        eslint-version:
+          - 9
+          - 10
         node-version:
           - 20
           - 22
@@ -63,15 +66,23 @@ jobs:
       - uses: ./.github/actions/prepare
         with:
           node-version: ${{ matrix.node-version }}
+      - run: pnpm install -D eslint@${{ matrix.eslint-version }}
       - run: pnpm run test --coverage
       - env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         if: always()
         uses: codecov/codecov-action@v5
   type_check:
-    name: Type Check
+    name: Type Check (ESLint ${{ matrix.eslint-version }})
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        eslint-version:
+          - 9
+          - 10
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       - uses: ./.github/actions/prepare
+      - run: pnpm install -D eslint@${{ matrix.eslint-version }}
       - run: pnpm typecheck

package.json

@@ -68,7 +68,7 @@
 	},
 	"devDependencies": {
 		"@eslint-community/eslint-plugin-eslint-comments": "4.6.0",
-		"@eslint/js": "9.39.1",
+		"@eslint/js": "10.0.1",
 		"@eslint/markdown": "7.5.1",
 		"@types/estree": "1.0.8",
 		"@types/node": "24.10.1",
@@ -77,7 +77,7 @@
 		"@vitest/coverage-v8": "4.0.13",
 		"@vitest/eslint-plugin": "1.6.1",
 		"console-fail-test": "0.6.0",
-		"eslint": "9.39.1",
+		"eslint": "10.0.0",
 		"eslint-doc-generator": "3.0.2",
 		"eslint-plugin-eslint-plugin": "7.3.0",
 		"eslint-plugin-jsdoc": "62.5.0",