Merge pull request #350 from nyx-space/bug/gh-349-duration-from-str-n… #631

Job	Run time
Check	12s
Coverage	36s
Lints	23s
no-std build (aarch64-unknown-none)	25s
no-std build (thumbv6m-none-eabi)	22s
Test Suite (ubuntu-latest, MSRV)	3m 6s
Test Suite (ubuntu-latest, stable)	2m 48s
Test Suite (macos-latest, MSRV)	1m 53s
Test Suite (macos-latest, stable)	2m 9s
Test Suite (windows-latest, MSRV)	8m 21s
Test Suite (windows-latest, stable)	9m 34s
Release	19s
	30m 8s

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