Update vlucas/phpdotenv requirement from ^3.4.0 to ^4.3.0

[dependabot[bot]]

Updates the requirements on vlucas/phpdotenv to permit the latest version.

Release notes

Sourced from vlucas/phpdotenv's releases.

V4.3.0 (16/10/2022)

We announce the immediate availability V4.3.0.

Changes

• Add official support for PHP 8.2 (c349cad3c63eae4343ceaa0d404db173fc9867d1)
• Made repository checks a little stricter (3b56df14b76e8f3dcec6376e5e4ac5cb0386b2c6)

Bug Fixes

• Fix issue where line ending in =" is incorrectly marked as a multi-line start (67a491df68208bef8c37092db11fa3885008efcf)

Commits

• 67a491d [4.3] Fix issue where line ending in =" is incorrectly marked as a multi-li...
• afb6dd2 [4.3] Dropped invalid tests (#544)
• c349cad [4.3] Support PHP 8.2 (#542)
• 888448c Bumped branch alias
• 3b56df1 [4.3] Made repository checks a little stricter (#541)
• 9f52bcb [4.3] Fixed static analysis runs (#543)
• 5fd7cbf Set allow-plugins for Composer 2.2 (#505)
• 77e9746 Upgraded static analyzers
• d96be01 Merge branch '3.6' into 4.2
• 5b547cd PHP 8.1 compatibility fixes
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)