cleaning, bumping and enhancing

[tobiasehlert]

• some cleanup
• bump go mods
• refactor of nested if statements (closes #175)
• stop using ioutil as it is deprecated

[sonarcloud[bot]]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
41.4% Duplication

Catch issues before they fail your Quality Gate with our IDE extension SonarLint