274: Update babel7 to the latest version 🚀 r=ForsakenHarmony a=greenkeeper[bot]
## There have been updates to the *babel7* monorepo:
- The `devDependency` [@babel/cli](https://www.npmjs.com/package/@babel/cli) was updated from `7.1.5` to `7.2.0`.
- The `dependency` [@babel/core](https://www.npmjs.com/package/@babel/core) was updated from `7.2.0` to `7.2.2`.
- The `devDependency` [@babel/node](https://www.npmjs.com/package/@babel/node) was updated from `7.2.0` to `7.2.2`.
- The `dependency` [@babel/plugin-proposal-class-properties](https://www.npmjs.com/package/@babel/plugin-proposal-class-properties) was updated from `7.1.0` to `7.2.1`.
- The `dependency` [@babel/plugin-syntax-jsx](https://www.npmjs.com/package/@babel/plugin-syntax-jsx) was updated from `7.0.0` to `7.2.0`.
- The `devDependency` [@babel/preset-env](https://www.npmjs.com/package/@babel/preset-env) was updated from `7.1.6` to `7.2.0`.
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](https://github.com/greenkeeperio/monorepo-definitions).
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