fix: Replace unmaintained useragent with ua-parser-js

[NERDHEAD-lab]

Checklist

• [x] I ran the linting and formatting tools (ESLint and Prettier)

Closes #[ISSUE_NUMBER]

Overview

This PR addresses a reported tmp package security vulnerability by replacing the unmaintained useragent library with ua-parser-js.

Changes

• Removal of useragent library:
  • Uninstalled useragent and @types/useragent packages.
  • Cleaned up related dependencies in package.json and package-lock.json.
• Introduction of ua-parser-js library:
  • Installed ua-parser-js and @types/ua-parser-js packages.
• Codebase Updates:
  • src/hot-reload/HotReloaderServer.ts: Updated user agent parsing logic to use UAParser instead of useragent.
  • src/hot-reload/SignEmitter.ts: Simplified the SignEmitter constructor to accept only necessary browser information (name, version) from the UAParser.IResult object, and adjusted related logic.
  • specs/SignEmitter.specs.ts: Completely refactored the test suite to align with ua-parser-js types and the updated SignEmitter constructor signature, moving away from useragent dependencies.
• Type Definition File Update:
  • The type definition in typings/webpack-ext-reloader.d.ts has been updated to a more structured format. This change was automatically applied during dependency updates and maintains backward compatibility for the public API. [377cd3f]
    • Maybe relevant to issue #583

Motivation

An npm audit report identified a security vulnerability in the tmp package, a dependency of useragent. As useragent is no longer actively maintained, replacing it with a modern and actively maintained alternative like ua-parser-js was necessary to resolve this issue and enhance the project's security posture.

Impact

• Backward Compatibility: The SignEmitter class is an internal implementation detail of the library, so there are no API changes for external users. Backward compatibility is maintained.
• Security: The security vulnerability related to the tmp package has been resolved.

Testing

The changes have been successfully built and tested using the following commands:

• npm run build
• npm run test
• npm run lint
• npm run format

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Summary by cubic

Replaced the unmaintained useragent library with ua-parser-js to fix a security vulnerability and update user agent parsing logic.

• Dependencies

• Removed useragent and @types/useragent.

• Added ua-parser-js and @types/ua-parser-js.

• Refactors

• Updated HotReloaderServer and SignEmitter to use ua-parser-js for browser info.

• Refactored related tests and type definitions for compatibility.