release 1.4.2

[sni]

I'd say it's about time for a new releae:

1.4.2 - Jan 03 2024
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Features:
* remove size limit on external command argument length
* performance improvements when having lots of comments
* respawn dead core worker

Changed:
* write objects.precache into a tmp file first
* increased CURRENT_NEB_API_VERSION to 6 (neb modules need to be rebuild)

Bugfixes:
* fix build error on fedora
* fix latency calculation having negative value sometimes