Test

Migrate to clap v3.0.0 #286

Job	Run time
Build with minimum supported Rust version	2m 51s
Build and test [beta]	1m 38s
Build and test [nightly]	1m 39s
Build and test [stable]	1m 32s
Check license annotations	9s
Check code formatting	13s
Lint with clippy	30s
	8m 32s

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