Update dependency org.cactoos:cactoos to v0.56.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.cactoos:cactoos	0.56.0 -> 0.56.1

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Release Notes

yegor256/cactoos (org.cactoos:cactoos)

v0.56.1: a few extra NULL checks would be helpful

Compare Source

See #​1739, release log:

• b1988b8 by @​yegor256: #​1739 java9 fix
• 1fdb928 by @​yegor256: #​1739 more null checks
• 2c9a15e by @​yegor256: better error messge
• af8a4bd by @​renovate[bot]: chore(deps): update dependency...
• 32dd85c by @​yegor256: Merge pull request #​1737 from ...

Released by Rultor 2.0-SNAPSHOT, see build log

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PR-Codex overview

This PR updates the version of the cactoos dependency in the pom.xml file from 0.56.0 to 0.56.1, indicating a minor version upgrade that may include bug fixes or new features.

Detailed summary

• Updated cactoos dependency version from 0.56.0 to 0.56.1 in pom.xml

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[yegor256]

@rultor please, try to merge, since 11 checks have passed

[rultor]

@rultor please, try to merge, since 11 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 11 checks have passed

@yegor256 Done! FYI, the full log is here (took me 3min).