update umd according to lodash changes

- Support browserified code running in a web worker
  (lodash/lodash@ee90f730b551f86586b7a301cbb60409f5fd065a)
- Support node-webkit
  (lodash/lodash@b0383b09785e911606b109c633bfd6b43e4604f3)
- Avoid detecting the `global` function in Java environments as the
  `freeGlobal` (lodash/lodash@4d57ac0ce16fd9df21856284b8c708ed5a27f6c3)

Just for reference, the following was also changed in lodash but not
commited here as it does not apply to luaparse:
lodash/lodash@0b900d94f746f59af4c777a1dcf82a02d9810fb3