[Snyk] Security upgrade react-scripts from 4.0.3 to 5.0.0

[adamlaska]

Snyk has created this PR to fix 2 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• explorer/package.json
• explorer/package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Regular Expression Denial of Service (ReDoS) SNYK-JS-SEMVER-3247795	696
	Improper Input Validation SNYK-JS-NANOID-8492085	601

---

Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information:
🧐 View latest project report
📜 Customise PR templates
🛠 Adjust project settings
📚 Read about Snyk's upgrade logic

---

Learn how to fix vulnerabilities with free interactive lessons:

🦉 Improper Input Validation
🦉 Regular Expression Denial of Service (ReDoS)

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.