build: update to eslint v9

This change adds support for eslint v9.  All three example projects have been updated to use the latest eslint, and the root package's dev and peer deps have been updated.
In order to make this work with both v9 and older versions, I had to update the parser options helper to adjust the config passed into the `RuleTester`.
It was also necessary update jest to a newer version, in order to resolve eslint's use of `node:fs/promises`.
Note: the removed test cases are exact duplicates of other tests.  v9 fails tests when its determined to be an exact duplicate.

Author: michaelfaith

.babelrc

@@ -8,7 +8,8 @@
         },
         "transformRuntime": false
       }
-    ]
+    ],
+    "@babel/preset-env"
   ],
   "plugins": [
     "@babel/plugin-transform-flow-strip-types",

.flowconfig

@@ -3,5 +3,6 @@
 <PROJECT_ROOT>/lib/.*
 <PROJECT_ROOT>/docs/.*
 <PROJECT_ROOT>/reports/.*
+<PROJECT_ROOT>/examples/.*
 [options]
 suppress_type=$FlowFixMe

.github/workflows/node-4+.yml

@@ -25,13 +25,26 @@ jobs:
       matrix:
         node-version: ${{ fromJson(needs.matrix.outputs.latest) }}
         eslint:
+          - 9
           - 8
           - 7
           - 6
           - 5
           - 4
           - 3
         exclude:
+          - node-version: 16
+            eslint: 9
+          - node-version: 15
+            eslint: 9
+          - node-version: 13
+            eslint: 9
+          - node-version: 11
+            eslint: 9
+          - node-version: 10
+            eslint: 9
+          - node-version: 9
+            eslint: 9
           - node-version: 15
             eslint: 8
           - node-version: 13
@@ -90,7 +103,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-            fetch-depth: 0
+          fetch-depth: 0
       - uses: ljharb/actions/node/install@main
         name: 'nvm install ${{ matrix.node-version }} && npm install'
         env:

__tests__/__util__/nodeReexports/assert.js

@@ -0,0 +1,3 @@
+import assert from 'assert';
+
+export default assert;

__tests__/__util__/nodeReexports/fs-promises.js

@@ -0,0 +1,3 @@
+import fs from 'fs/promises';
+
+export default fs;

__tests__/__util__/nodeReexports/fs.js

@@ -0,0 +1,3 @@
+import fs from 'fs';
+
+export default fs;

__tests__/__util__/nodeReexports/path.js

@@ -0,0 +1,3 @@
+import path from 'path';
+
+export default path;

__tests__/__util__/nodeReexports/url.js

@@ -0,0 +1,3 @@
+import url from 'url';
+
+export default url;

__tests__/__util__/nodeReexports/util.js

@@ -0,0 +1,3 @@
+import util from 'util';
+
+export default util;

__tests__/__util__/parserOptionsMapper.js

@@ -1,26 +1,53 @@
+import { version as eslintVersion } from 'eslint/package.json';
+import semver from 'semver';
+
+const usingLegacy = semver.major(eslintVersion) < 9;
+
 const defaultParserOptions = {
-  ecmaVersion: 2018,
   ecmaFeatures: {
     experimentalObjectRestSpread: true,
     jsx: true,
   },
 };
 
+const defaultLegacyParserOptions = {
+  ...defaultParserOptions,
+  ecmaVersion: 2018,
+};
+
+const defaultLanguageOptions = {
+  ecmaVersion: 'latest',
+  parserOptions: {
+    ...defaultParserOptions,
+  },
+};
+
 export default function parserOptionsMapper({
   code,
   errors,
   options = [],
-  parserOptions = {},
-  settings,
+  languageOptions = {},
+  settings = {},
 }) {
-  return {
-    code,
-    errors,
-    options,
-    parserOptions: {
-      ...defaultParserOptions,
-      ...parserOptions,
-    },
-    settings,
-  };
+  return usingLegacy
+    ? {
+      code,
+      errors,
+      options,
+      parserOptions: {
+        ...defaultLegacyParserOptions,
+        ...languageOptions,
+      },
+      settings,
+    }
+    : {
+      code,
+      errors,
+      options,
+      languageOptions: {
+        ...defaultLanguageOptions,
+        ...languageOptions,
+      },
+      settings,
+    };
 }