[Frontend] Move react-scripts to devDependencies

[terryttsai]

Description of the change

Move react-scripts to devDependencies

This helps avoid security vulnerability as Peter surfaced here: https://recidiviz.slack.com/archives/C034W7C26NL/p1665182436209979

Type of change

All pull requests must have at least one of the following labels applied (otherwise the PR will fail):

Label	Description
Type: Bug	non-breaking change that fixes an issue
Type: Feature	non-breaking change that adds functionality
Type: Breaking Change	fix or feature that would cause existing functionality to not work as expected
Type: Non-breaking refactor	change addresses some tech debt item or prepares for a later change, but does not change functionality
Type: Configuration Change	adjusts configuration to achieve some end related to functionality, development, performance, or security
Type: Dependency Upgrade	upgrades a project dependency - these changes are not included in release notes

Related issues

Closes #65

Checklists

Development

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These boxes should be checked by the submitter prior to merging:

• Tests have been written to cover the code changed/added as part of this pull request

Code review

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• This pull request has a descriptive title and information useful to a reviewer
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• Potential security implications or infrastructural changes have been considered, if relevant

[lilidworkin]

Oh nice, thanks!!

[mxosman]

Thank you, Terry!