fix: throwing error on require nodemon

     Fixes remy#1292

     Null was not being checked on index.js

Author: chakradeb

lib/utils/index.js

@@ -21,7 +21,7 @@ var utils = (module.exports = {
     var p = module.parent;
     while (p) {
       // in electron.js engine it happens
-      if (p.filename === undefined) {
+      if (!p.filename) {
         return true;
       }
       if (p.filename.indexOf('bin' + path.sep + 'nodemon.js') !== -1) {

package-lock.json

@@ -41,4 +41,4 @@ describe('nodemon full config test', function () {
       }
     });
   });
-});
+});