build(deps): update doctrine/dbal requirement from 4.1.1 to 4.2.1

[dependabot[bot]]

Updates the requirements on doctrine/dbal to permit the latest version.

Release notes

Sourced from doctrine/dbal's releases.

4.2.1

Release Notes for 4.2.1

4.2.1

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

Commits

• dadd353 Merge branch '3.9.x' into 4.2.x
• 61446f0 Remove broken links from php doc block (#6541)
• b4a1c16 Merge branch '4.1.x' into 4.2.x
• ad11c4a Merge branch '3.9.x' into 4.1.x
• f1d0dbc Prepare the 4.2.0 release (#6540)
• 9744af4 Implement an EnumType for MySQL/MariaDB (#6536)
• 54be50e Leverage the new PDO subclasses (#6532)
• e0f3674 Merge branch '4.1.x' into 4.2.x
• dd356be Merge branch '3.9.x' into 4.1.x
• 9d881b7 Merge branch '4.1.x' into 4.2.x
• Additional commits viewable in compare view

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