feat: Add maintenanceKey and bump dependencies

[cbaker6]

• Add support for maintenanceKey
• Update to Vapor 4.113.2
• Update Docker image to Parse-Server 8.0.0
• Update rest of dependencies

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 37.42%. Comparing base (a33295c) to head (a49b24d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/ParseServerSwift/Parse.swift	0.00%	1 Missing ⚠️
...es/ParseServerSwift/ParseServerConfiguration.swift	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
+ Coverage   37.41%   37.42%   +0.01%     
==========================================
  Files          11       11              
  Lines        1184     1189       +5     
==========================================
+ Hits          443      445       +2     
- Misses        741      744       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.