v0.0.5: Cleanup release

This is a code cleanup release. It doesn't add any functionality but introduces some code cleanups (and CI/CD workflow additions).

What's Changed

• Add SonarQube integration for code analysis by @wneessen in #4
• Fix Go version syntax in SonarQube workflow by @wneessen in #5
• Code cleanup by @wneessen in #6
• Refactor error messages in niljson tests. by @wneessen in #7
• More code cleanup and security workflows by @wneessen in #8
• Fix typo and improve readability in README.md by @wneessen in #9

Full Changelog: v0.0.4...v0.0.5