v0.26.0: New ErrorParsing and minor fixes
As the releases before, this release has 100% test coverage.
Tested with Go 1.14, 1.15, 1.16, 1.17, 1.18 and 1.19.
- Expose ErrorParsing as a generic error
The ErrorParsing error indicates there was a problem parsing the cli args.
This can be used for example, to print the help only in cases where the user didn't enter valid cli args.
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Refactor dag package tests to remove most sleeps.
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Bug fix: Don't check for required options when the help option is passed