fix: negative duration from uint64 to int64 conversion #179

Job	Run time
Settings / settings	3s
Lint / Lint	14s
Build docs / Build docs	32s
Build and test / Matrix configuration	13s
Test Linux distros / Matrix configuration	6s
Official Docker image / Build	38s
Test Linux distros / Alpine	13m 14s
Test Linux distros / ArchLinux	12m 44s
Test Linux distros / CentOS	11m 47s
Test Linux distros / Debian	11m 43s
Test Linux distros / Fedora	10m 50s
Test Linux distros / OpenSUSE	12m 2s
Test Linux distros / Ubuntu	12m 35s
Build and test / linux x64 Debug static	12m 24s
Build and test / linux x64 Debug shared	11m 9s
Build and test / linux x64 Release static	11m 46s
Build and test / linux x64 Release shared	11m 49s
Build and test / osx x64 Debug static	11m 15s
Build and test / osx x64 Debug shared	7m 29s
Build and test / osx x64 Release static	11m 14s
Build and test / osx x64 Release shared	7m 44s
Build and test / osx arm64 Debug static	7m 47s
Build and test / osx arm64 Debug shared	4m 30s
Build and test / osx arm64 Release static	8m 36s
Build and test / osx arm64 Release shared	5m 33s
	3h 17m 57s

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