fix(react): add prop-types to package.json deps

[joshblack]

This came up in Slack (most likely related to the react-scripts v5 and webpack 5 updates) as an issue where our calls to prop-types was ambiguous since we do not list it as a dependency. This PR updates our packages/react package to explicitly list prop-types as a dependency.

Changelog

New

Changed

• Move prop-types from devDependencies to dependencies

Removed

Testing / Reviewing

• Verify CI passes as expected

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