Fix.

node_modules/which-module/index.js

@@ -1,9 +0,0 @@
-'use strict'
-
-module.exports = function whichModule (exported) {
-  for (var i = 0, files = Object.keys(require.cache), mod; i < files.length; i++) {
-    mod = require.cache[files[i]]
-    if (mod.exports === exported) return mod
-  }
-  return null
-}