cli: port from structopt v0.2 to clap v4 #98
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The structopt crate dependency is currently really old (the last release in the v0.2 branch was in 2019). The functionality previously provided by structopt has been merged into clap itself as of v3.
This PR updates askalono-cli from structopt v0.2 to clap v4. I have verified that all CLI options remain the same. Help output is equivalent, except much prettier ✨ thanks to better formatting in recent clap versions.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.