[BUGFIX beta] wrap es3 keywords in quotes

But only for production builds.

closes GH-5128
upgrade es3-safe-recast to not be broken :)
Merge pull request #2 from stefanpenner/pr/5131

upgrade es3-safe-recast to not be broken :)
Merge pull request #5131 from fivetanley/es3saferecast

wrap es3 keywords in quotes in production builds