Update karma: 2.0.4 -> ^3.0.0

What does this MR do?

Update karma from 2.0.4 to 3.0.0. According to the changelog the only breaking change is the removal of support for node@4.

• Changelog v2.0.5
• Changelog v3.0.0
• v2.0.4...v3.0.0

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides