fix: duration formatting and update mpd testdata to reflect new format #390

Job	Run time
Settings / settings	4s
Lint / Lint	13s
Test Linux distros / Matrix configuration	6s
Official Docker image / Build	11m 44s
Build docs / Build docs	27s
Build and test / Matrix configuration	7s
Test Linux distros / Alpine	13m 5s
Test Linux distros / ArchLinux	11m 38s
Test Linux distros / CentOS	10m 49s
Test Linux distros / Debian	11m 2s
Test Linux distros / Fedora	10m 43s
Test Linux distros / OpenSUSE	11m 5s
Test Linux distros / Ubuntu	12m 12s
Build and test / linux x64 Debug static	9m 38s
Build and test / linux x64 Debug shared	10m 54s
Build and test / linux x64 Release static	11m 20s
Build and test / linux x64 Release shared	11m 41s
Build and test / osx x64 Debug static	18m 17s
Build and test / osx x64 Debug shared	9m 40s
Build and test / osx x64 Release static	10m 22s
Build and test / osx x64 Release shared	19m 47s
Build and test / win x64 Debug static	14m 46s
Build and test / win x64 Debug shared	14m 56s
Build and test / win x64 Release static	17m 32s
Build and test / win x64 Release shared	17m 1s
Build and test / linux arm64 Debug static	9m 11s
Build and test / linux arm64 Debug shared	9m 21s
Build and test / linux arm64 Release static	9m 24s
Build and test / linux arm64 Release shared	9m 13s
	4h 56m 18s

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