Add failongiterror as parameter to report any git error as NuKeeper e…

[MartinDemberger]

✨ What kind of change does this PR introduce? (Bug fix, feature, docs update...)

A new option is added. When the option FailOnGitError is set the run failes when the call to get the available versions failes.

This is only the first part of a fix for #930

⤵️ What is the current behavior?

On most of git calls the error is ignored and NuKeeper notifies success.

🆕 What is the new behavior (if this is a feature change)?

A new option --failongiterror is introduced and when this option is set an error in a git call results in an error of NuKeeper.

In the current process the option is only used when searching for the available package versions.

💥 Does this PR introduce a breaking change?

No, the default behaviour is unchanged.

🐛 Recommendations for testing

📝 Links to relevant issues/docs

🤔 Checklist before submitting

• All projects build
• Relevant documentation was updated

[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.