[Fix] no-cycle: create must *always* return an object, even if there’s no listeners

Author: ljharb

src/rules/no-cycle.js

@@ -22,7 +22,7 @@ module.exports = {
 
   create: function (context) {
     const myPath = context.getFilename()
-    if (myPath === '<text>') return  // can't cycle-check a non-file
+    if (myPath === '<text>') return {} // can't cycle-check a non-file
 
     const options = context.options[0] || {}
     const maxDepth = options.maxDepth || Infinity