Update dependency firebase to v4.5.2 - autoclosed

[uriel-mend-app[bot]]

This PR contains the following updates:

Package	Type	Update	Change
firebase (source, changelog)	dependencies	minor	4.4.0 -> 4.5.2

By merging this PR, the issue #46 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	8.8	CVE-2018-3728

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Release Notes

firebase/firebase-js-sdk

### [`v4.5.2`](https://togithub.com/firebase/firebase-js-sdk/releases/tag/firebase%404.5.2) [Compare Source](https://togithub.com/firebase/firebase-js-sdk/compare/v4.5.1...firebase@4.5.2) #### Fixes - Fixed a regression where the `react-native` property was missing from the [`firebase`](https://npm.im/firebase) package.json - Fixed a regression where the value of `firebase.SDK_VERSION` wasn't properly being populated. ### [`v4.5.1`](https://togithub.com/firebase/firebase-js-sdk/releases/tag/v4.5.1) [Compare Source](https://togithub.com/firebase/firebase-js-sdk/compare/v4.5.0...v4.5.1) #### Features Shipped individual modules for the following packages: - `@firebase/app` - `@firebase/auth` - `@firebase/database` - `@firebase/firestore` - `@firebase/messaging` - `@firebase/polyfill` - `@firebase/storage` - `@firebase/util` ### [`v4.5.0`](https://togithub.com/firebase/firebase-js-sdk/releases/tag/v4.5.0) [Compare Source](https://togithub.com/firebase/firebase-js-sdk/compare/v4.4.0...v4.5.0) #### Features - Added support for Cloud Firestore. For more information, see the following resources: - [Blog post](https://firebase.googleblog.com/2017/10/introducing-cloud-firestore.html) - [Web getting started guide](https://firebase.google.com/docs/firestore/client/setup-web) - [Reference Documentation](https://firebase.google.com/docs/reference/js/firebase.firestore.html)

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