[Snyk] Upgrade: react, react-dom

[snyk-bot]

Snyk has created this PR to upgrade multiple dependencies.

👯‍♂ The following dependencies are linked and will therefore be updated together. :information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

Name	Versions	Released on
reactfrom 16.4.1 to 16.13.0	34 versions ahead of your current version	a month agoon 2020-02-26
react-domfrom 16.4.1 to 16.13.0	33 versions ahead of your current version	a month agoon 2020-02-26

The recommended version fixes:

Severity	Issue	Exploit Maturity
	Cross-site Scripting (XSS) npm:react-dom:20180802	Proof of Concept

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