Add missing babel-preset-env dependency

[Hypnosphi]

Issue: #5498 broke the apps that doesn't have a dependency on babel-preset-env. We didn't catch that issue on CI because we have babel-preset-env hoisted from @storybook/react-native and ember-cli

Note that both this and #5498 can be reverted, if telejson gets rid of safe-eval dependency, see storybookjs/telejson#4

[Jessidhia]

This was the babel 6 version of preset-env. Are you sure this is the right dependency?

[shilman]

@Jessidhia Sounds like we can get rid of it before the final release:

Note that both this and #5498 can be reverted, if telejson gets rid of safe-eval dependency, see storybooks/telejson#4

[Hypnosphi]

@Jessidhia it turned out that this particular package is compatible both with Babel 6 and 7 (at least it works). I was surprised as well.