Update dependency pgtk to v0.8.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pgtk	'0.8.0' -> '0.8.1'

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Release Notes

yegor256/pgtk (pgtk)

v0.8.1: exec() must log on failure too

Compare Source

See #​37, release log:

• 4dbad4f by @​yegor256: #​37 rultor up
• 706b7b8 by @​yegor256: #​37 log errors
• 9e6d361 by @​yegor256: #​37 check logging
• 59b5321 by @​renovate[bot]: Update dependency ubuntu to v2...

Released by Rultor 2.0-SNAPSHOT, see build log

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[yegor256]

@rultor please, try to merge, since 5 checks have passed

[rultor]

@rultor please, try to merge, since 5 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor please, try to merge, since 5 checks have passed

@yegor256 Done! FYI, the full log is here (took me 8min)