Version switch where we load RuleTester from

.github/workflows/test.yml

@@ -46,9 +46,11 @@ jobs:
         include:
           - name: 'Test with Eslint v7'
             cmd: |
-              npm i eslint@^7
+              npm i eslint@^7 \
+                    typescript-eslint-utils-5@npm:@typescript-eslint/utils@^5.57.0
               cat package-lock.json | grep -A 1 \
                 -e "\"node_modules/eslint\": {" \
+                -e "\"node_modules/@typescript-eslint-utils-5\": {" \
             test: npm run test
             build: npm run build
           - name: 'Test with Typescript v4'

package.json

@@ -26,7 +26,8 @@
   "dependencies": {
     "@typescript-eslint/utils": "^6.0.0",
     "tslib": "^2.3.1",
-    "tsutils": "^3.21.0"
+    "tsutils": "^3.21.0",
+    "typescript-eslint-utils-5": "npm:@typescript-eslint/utils@^5.62.0"
   },
   "peerDependencies": {
     "eslint": "^7.0.0 || ^8.0.0",
@@ -44,8 +45,8 @@
     "@types/jest": "^29.5.0",
     "@types/node": "^18.15.11",
     "@typescript-eslint/eslint-plugin": "^6.0.0",
-    "@typescript-eslint/rule-tester": "^6.0.0",
     "@typescript-eslint/parser": "^6.0.0",
+    "@typescript-eslint/rule-tester": "^6.0.0",
     "commitizen": "^4.2.4",
     "cz-conventional-changelog": "^3.3.0",
     "eslint": "^8.0.0",

tests/rules/deprecation.test.ts

@@ -1,5 +1,5 @@
 import { TSESLint } from '@typescript-eslint/utils';
-import { RuleTester } from '@typescript-eslint/rule-tester';
+import { RuleTester } from '../utils/get-rule-tester';
 import rule, { MessageIds, Options } from '../../src/rules/deprecation';
 import * as path from 'path';
 

tests/utils/get-rule-tester.ts

@@ -0,0 +1,9 @@
+let RuleTester: any;
+try {
+  ({ RuleTester } = require('@typescript-eslint/rule-tester'));
+} catch {
+  const { TSESLint } = require('@typescript-eslint-utils-5');
+  RuleTester = TSESLint.RuleTester;
+}
+
+export { RuleTester };