Update ESLint to v9, drop support for Node.js v16 (#2250)

Author: fisker

.github/workflows/main.yml

@@ -16,19 +16,20 @@ jobs:
       matrix:
         node-version:
           - 20
-          - 16
+          - 18
         os:
           - ubuntu-latest
           - windows-latest
-        include:
-          - os: ubuntu-latest
-            node-version: 18
+        # Even numbers of node-version
+        # include:
+        #   - os: ubuntu-latest
+        #     node-version: 18
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm install
+      - run: npm install --legacy-peer-deps
       - run: npx ava
   lint-test:
     runs-on: ${{ matrix.os }}
@@ -43,7 +44,7 @@ jobs:
         with:
           # Locked due to the difference of `zlib.gzipSync()` between Node.js versions
           node-version: 20
-      - run: npm install
+      - run: npm install --legacy-peer-deps
       - run: npm run lint
       - run: npx del-cli test/snapshots --verbose
       # Force update snapshots, https://github.com/avajs/ava/discussions/2754
@@ -61,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
-      - run: npm install
+      - run: npm install --legacy-peer-deps
       - run: npm run run-rules-on-codebase
   integration:
     name: Integration test (${{ matrix.group }})
@@ -84,5 +85,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
-      - run: npm install
+      - run: npm install --legacy-peer-deps
       - run: npm run integration -- --group ${{ matrix.group }}

package.json

@@ -51,7 +51,7 @@
 	"dependencies": {
 		"@babel/helper-validator-identifier": "^7.22.20",
 		"@eslint-community/eslint-utils": "^4.4.0",
-		"@eslint/eslintrc": "^2.1.4",
+		"@eslint/eslintrc": "^3.0.0",
 		"ci-info": "^4.0.0",
 		"clean-regexp": "^1.0.0",
 		"core-js-compat": "^3.34.0",
@@ -69,20 +69,21 @@
 	"devDependencies": {
 		"@babel/code-frame": "^7.23.5",
 		"@babel/core": "^7.23.6",
-		"@babel/eslint-parser": "^7.23.3",
+		"@babel/eslint-parser": "^7.24.1",
 		"@lubien/fixture-beta-package": "^1.0.0-beta.1",
 		"@typescript-eslint/parser": "^7.5.0",
 		"ava": "^6.0.1",
 		"c8": "^8.0.1",
 		"chalk": "^5.3.0",
 		"enquirer": "^2.4.1",
-		"eslint": "^8.56.0",
+		"eslint": "^9.0.0",
 		"eslint-ava-rule-tester": "^5.0.1",
 		"eslint-doc-generator": "^1.7.0",
 		"eslint-plugin-eslint-plugin": "^5.2.1",
 		"eslint-plugin-internal-rules": "file:./scripts/internal-rules/",
 		"eslint-remote-tester": "^3.0.1",
 		"eslint-remote-tester-repositories": "^1.0.1",
+		"espree": "^10.0.0",
 		"execa": "^8.0.1",
 		"listr": "^0.14.3",
 		"lodash-es": "^4.17.21",