CI

Get structured logging API ready for stabilization #582

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Job	Run time
Clippy	21s
Test (stable)	46s
Embedded	10s
Test (beta)	50s
Check Documentation	11s
Test (nightly)	44s
Feature check	17s
Test (macos)	2m 5s
Minimal versions	15s
Test (win32)	1m 30s
Test (win64)	1m 48s
MSRV	3m 5s
Test (mingw)	2m 2s
Rustfmt	16s
	14m 20s