Update babel7 to the latest version 🚀

[greenkeeper]

There have been updates to the babel7 monorepo:

• The devDependency @babel/core was updated from 7.3.4 to 7.4.0.
• The devDependency @babel/parser was updated from 7.3.4 to 7.4.0.
• The devDependency @babel/preset-env was updated from 7.3.4 to 7.4.0.

These versions are not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

This monorepo update includes releases of one or more dependencies which all belong to the babel7 group definition.

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Find out more about this release.

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Your Greenkeeper bot 🌴

[greenkeeper]

• The devDependency @babel/core was updated from 7.3.4 to 7.4.0.
• The devDependency @babel/parser was updated from 7.3.4 to 7.4.0.
• The devDependency @babel/preset-env was updated from 7.3.4 to 7.4.1.

Update to these versions instead 🚀