Update dependency rubocop-rspec to v3.0.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rubocop-rspec (changelog)	'3.0.3' -> '3.0.4'

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Release Notes

rubocop/rubocop-rspec (rubocop-rspec)

v3.0.4

Compare Source

• Fix false-negative for UnspecifiedException when matcher is chained. ([@​r7kamura])

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[yegor256]

@rultor please, try to merge, since 9 checks have passed

[rultor]

@rultor please, try to merge, since 9 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 9 checks have passed

@yegor256 Done! FYI, the full log is here (took me 17min)