feature/react19

[tusharpandey13]

This change enables React 19 support for auth0-react
This change builds upon PR #819 by @leefreemanxyz

Changes

• Version bumps of related packages in package.json, package-lock.json update.
• Updated tests to use the new version of packages.
• Added handling for an edge case where error was not thrown if popup was closed in loginWithPopup.
• Updated sample code to use React 19.
• Linting changes.

Commits

• feat(react 19): update react to 19, testing libraries deps to latest and fix broken tests
• chore: update @types/react and @types/react-dom to version 19.0.0
• refactor: remove explicit return types for functional components in tests and providers
• add explicit type annotations for React.JSX.Element
• handle popup closed error not thrown
• update example code
• update tests
• package json changes

Testing

PASSING

=============================== Coverage summary ===============================
Statements   : 100% ( 166/166 )
Branches     : 100% ( 72/72 )
Functions    : 100% ( 41/41 )
Lines        : 100% ( 158/158 )
================================================================================

Test Suites: 8 passed, 8 total
Tests:       81 passed, 81 total
Snapshots:   0 total
Time:        4.995 s
Ran all test suites.

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not the default branch