✅ Pester Tests

[hjorslev]

PR Summary

This PR adds missing Pester Tests or updates the existing ones.

Resolves #31.

Context

Changes

• Find-SteamAppID: Mock the response rather than using the actual API.
• Get-SteamFriendList
• Get-SteamNews
• Get-SteamPlayerBan
• Get-SteamPlayerSummary
• Get-SteamRecentlyPlayedGame

Checklist

• Pull Request has a meaningful title.
• Summarised changes.
• Pull Request is ready to merge & is not WIP.
• Added tests / only testable interactively.
  • Make sure you add a new test if old tests do not effectively test the code changed.
• Added documentation / opened issue to track adding documentation at a later date.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.