Flags can not be merged with options

[JeffDess]

Flags and options cannot be merged in a single block. For instance lets -ht lint returns Error: unknown task: -ht. Not necessarily a problem, it works with individual options/flags like lets -h -t lint, but maybe that's worth fixing?

[JeffDess]

Since reporting this bug, the --task option has been converted to positional argument of --help. Still, similar use case could be needed.