Use extension trait to simplify config #834

Job	Run time
Clippy (-Zbuild-std)	1m 14s
Clippy (MSRV) (ubuntu-latest)	2m 17s
Clippy (stable) (ubuntu-latest)	55s
Test (ubuntu-latest)	1s
Clippy (MSRV) (macos-latest)	2m 5s
Clippy (stable) (macos-latest)	23s
Clippy (MSRV) (windows-latest)	3m 6s
Test (macos-latest)	16s
Clippy (stable) (windows-latest)	2m 15s
Test (windows-latest)	1s
Ktlint	50s
Check for documentation errors	20s
Rustfmt	11s
Check semver compatibility	2m 42s
Test (Android)	4m 23s
Test iOS (Catalyst)	18s
Test (FreeBSD)	2m 18s
Verify Android artifacts	1m 22s
	24m 57s

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