feat: negative CTS offset that results in PTS < DTS #90

Job	Run time
Settings / settings	3s
Lint / Lint	16s
Test Linux distros / Matrix configuration	5s
Build docs / Build docs	29s
Official Docker image / Build	36s
Build and test / Matrix configuration	7s
Test Linux distros / Alpine	13m 9s
Test Linux distros / ArchLinux	14m 4s
Test Linux distros / CentOS	11m 14s
Test Linux distros / Debian	10m 40s
Test Linux distros / Fedora	10m 57s
Test Linux distros / OpenSUSE	10m 51s
Test Linux distros / Ubuntu	12m 30s
Build and test / linux x64 Debug static	10m 16s
Build and test / linux x64 Debug shared	10m 34s
Build and test / linux x64 Release static	11m 20s
Build and test / linux x64 Release shared	11m 4s
Build and test / osx x64 Debug static	10m 43s
Build and test / osx x64 Debug shared	20m 33s
Build and test / osx x64 Release static	22m 35s
Build and test / osx x64 Release shared	17m 0s
Build and test / win x64 Debug static	14m 33s
Build and test / win x64 Debug shared	14m 50s
Build and test / win x64 Release static	17m 44s
Build and test / win x64 Release shared	17m 36s
	4h 23m 49s

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