Changes proposed in this PR:

• Correctly pass a list to the function
• Correctly check consistency of input arrays (allclose could also throw errors if the arrays had a wrong size, but this was not accounted for)

The original test incorrectly checked for a ValueError: The natural_earth method would return a string (which was iterable), and a ValueError was thrown because a file could not be read from a single character...

This PR fixes the broken pipeline in develop

PR Author Checklist

• Read the Contribution Guide
• Correct target branch selected (if unsure, select develop)
• Descriptive pull request title added
• Source branch up-to-date with target branch
• Documentation updated
• Tests updated
• Tests passing
• No new linter issues
• Changelog updated

PR Reviewer Checklist

• Read the Contribution Guide
• CLIMADA Reviewer Checklist passed
• Tests passing
• No new linter issues