Update dependency doctrine/doctrine-migrations-bundle to v3.4.0

This MR contains the following updates:

Package	Type	Update	Change
doctrine/doctrine-migrations-bundle (source)	require	minor	3.3.1 -> 3.4.0

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Release Notes

doctrine/DoctrineMigrationsBundle (doctrine/doctrine-migrations-bundle)

v3.4.0

Compare Source

Release Notes for 3.4.0

Feature release (minor)

3.4.0

• Total issues resolved: 0
• Total pull requests resolved: 5
• Total contributors: 2

Improvement

• 535: Switch to a modern directory structure thanks to @​greg0ire
• 526: Add support for --complete thanks to @​greg0ire

Bugfix

• 540: Fix .gitattribute thanks to @​connorhu

Documentation

• 539: Remove tautological comments thanks to @​greg0ire

Static Analysis

• 538: Address static analysis issues from the baselines thanks to @​greg0ire

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