chore(deps): bump vlucas/phpdotenv from 5.3.1 to 5.4.1

Sourced from vlucas/phpdotenv's releases.

<h2>V5.4.1 (12/12/2021)</h2>

We announce the immediate availability V5.4.1.

<h3>Bug Fixes</h3>

• Updated author homepages (2e93cc9)
• Cleaned up phpdoc types (264dce5)

<h2>V5.4.0 (10/11/2021)</h2>

We announce the immediate availability V5.4.0.

<h3>New Features</h3>

• Add support for BOM-signed env files (#501)

• 264dce5 Cleanup
• bb78c37 Merge branch '4.2'
• 77e9746 Upgraded static analyzers
• d96be01 Merge branch '3.6' into 4.2
• 5b547cd PHP 8.1 compatibility fixes
• b710903 Merge branch '2.6' into 3.6
• 2e93cc9 Update composer.json
• d4394d0 Add support for BOM-signed env files (#501)
• 7261bb0 Bumped version
• See full diff in compare view

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