Update dependency roave/backward-compatibility-check to ^8.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
roave/backward-compatibility-check	^8.3.0 -> ^8.4.0

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Release Notes

Roave/BackwardCompatibilityCheck (roave/backward-compatibility-check)

v8.4.0

Compare Source

Release Notes for 8.4.0

Feature release (minor)

8.4.0

• Total issues resolved: 0
• Total pull requests resolved: 2
• Total contributors: 2

enhancement

• 751: PHP 8.3 build thanks to @​michael-rubel

renovate

• 744: Update dependency doctrine/coding-standard to v12 thanks to @​renovate[bot]

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Configuration

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[github-actions]

🏰 Composer Production Dependency changes 🏰

Prod Packages	Operation	Base	Target	Link
azjezz/psl	Upgraded	2.7.0	2.8.0	Compare
composer/composer	Upgraded	2.6.4	2.6.5	Compare
composer/spdx-licenses	Upgraded	1.5.7	1.5.8	Compare
react/promise	Upgraded	v3.0.0	v3.1.0	Compare
revolt/event-loop	Upgraded	v1.0.3	v1.0.5	Compare
roave/backward-compatibility-check	Upgraded	8.3.0	8.4.0	Compare
roave/better-reflection	Upgraded	6.13.0	6.18.0	Compare
roave/signature	Upgraded	1.7.0	1.8.0	Compare