Refactor scan() #1040

Job	Run time
Ensure 'cargo fmt' has been run	5s
Extract crate metadata	4s
Minimum supported rust version	2m 27s
aarch64-unknown-linux-gnu (ubuntu-20.04)	9m 1s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	9m 19s
arm-unknown-linux-musleabihf (ubuntu-20.04)	5m 34s
i686-pc-windows-msvc (windows-2019)	7m 30s
i686-unknown-linux-gnu (ubuntu-20.04)	8m 29s
i686-unknown-linux-musl (ubuntu-20.04)	5m 31s
x86_64-apple-darwin (macos-12)	3m 25s
x86_64-pc-windows-gnu (windows-2019)	6m 58s
x86_64-pc-windows-msvc (windows-2019)	6m 45s
x86_64-unknown-linux-gnu (ubuntu-20.04)	7m 59s
x86_64-unknown-linux-musl (ubuntu-20.04)	7m 7s
Publish to Winget	0s
	1h 20m 14s

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