Fix: export all rules when using eslint v5

lib/rules.js

@@ -11,7 +11,8 @@
 
 const fs = require("fs");
 const path = require("path");
-const builtin = require("eslint/lib/rules/index");
+const eslintVersion = require("eslint/package.json").version;
+
 
 /**
  * Loads a given rule from the filesystem and generates its documentation URL
@@ -29,10 +30,25 @@ function loadRule(ruleName) {
 
 const allRules = {};
 
-for (const [ruleId, rule] of builtin) {
-    if (rule.meta.fixable) {
-        allRules[ruleId] = rule;
+// eslint v6 restructed its codebase
+// TODO: this might be unreliable
+if (eslintVersion >= "6.0.0") {
+    const builtin = require("eslint/lib/rules");
+
+    for (const [ruleId, rule] of builtin) {
+        if (rule.meta.fixable) {
+            allRules[ruleId] = rule;
+        }
     }
+} else {
+    const builtin = require("eslint/lib/built-in-rules-index");
+
+    Object.keys(builtin)
+        .filter(rule => builtin[rule].meta.fixable)
+        .reduce((acc, cur) => {
+            acc[cur] = builtin[cur];
+            return acc;
+        }, allRules);
 }
 
 // import all rules in lib/rules

package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@not-an-aardvark/node-release-script": "^0.1.0",
     "@types/eslint": "^4.16.6",
-    "eslint": "https://github.com/eslint/eslint.git",
+    "eslint": "^5.16.0",
     "eslint-config-eslint": "^5.0.1",
     "eslint-plugin-eslint-plugin": "^2.0.1",
     "eslint-plugin-node": "^9.1.0",