test: restore tests; reapply check-examples testing for eslint@7

Author: brettz9

Diff for: test/rules/index.js

@@ -1,19 +1,21 @@
 import camelCase from 'camelcase';
 import {
+  ESLint,
   RuleTester,
 } from 'eslint';
 import defaultsDeep from 'lodash.defaultsdeep';
+import semver from 'semver';
 import config from '../../src';
 import ruleNames from './ruleNames.json';
 
 const ruleTester = new RuleTester();
 
 const main = async () => {
   for (const ruleName of process.env.npm_config_rule ? process.env.npm_config_rule.split(',') : ruleNames) {
-    if (ruleName === 'check-examples') {
+    if (semver.gte(ESLint.version, '8.0.0') && ruleName === 'check-examples') {
       // TODO: This rule cannot yet be supported for ESLint 8;
       // The possibility for ESLint 8 support is being tracked at https://github.com/eslint/eslint/issues/14745
-      return;
+      continue;
     }
 
     const rule = config.rules[ruleName];