Update dependency vlucas/phpdotenv to v5

Author: renovate-bot

composer.json

@@ -16,7 +16,7 @@
         "rdlowrey/auryn": "^1.4",
         "duncan3dc/console": "^0.4.1",
         "guzzlehttp/guzzle": "^6.3",
-        "vlucas/phpdotenv": "^2.4",
+        "vlucas/phpdotenv": "^5.0",
         "monolog/monolog": "^1.21",
         "namshi/cuzzle": "^2.0",
         "ramsey/uuid": "^3.5"