error when processing .js file that has .json substring

[jiixing]

Found a bug when including core-js package in brunch

This package has two files with .json substring in it

https://github.com/zloirock/core-js/blob/ae33634b34/packages/core-js/modules/es.json.stringify.js
https://github.com/zloirock/core-js/blob/ae33634b34/packages/core-js/modules/es.json.to-string-tag.js

The code in

deppack/lib/modules.js

Line 185 in bef509b

if (filePath.indexOf('.json') === -1) {

should be changed to

  if (filePath.endsWith('.json') === false) {