chore: streamline the workflow steps (#22) #64

Job	Run time
Test Suite (ubuntu-latest, beta)	2m 57s
Clippy	1m 5s
Test Suite (ubuntu-latest, stable)	3m 37s
Test Suite (ubuntu-latest, nightly)	3m 20s
Documentation	1m 5s
Rustfmt	5s
Unused Dependencies	1m 7s
	13m 16s

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