Update dependency @babel/preset-env to v7.5.4

Thalia Technicie
2019-07-11T20:42:06+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [@babel/preset-env](https://babeljs.io/) ([source](https://github.com/babel/babel)) | devDependencies | patch | [`7.5.0` -> `7.5.4`](https:...

@babel/preset-env (source) | devDependencies | patch | 7.5.0 -> 7.5.4