Update git lib

Author: sebastianfeldmann

composer.json

@@ -39,7 +39,7 @@
     "captainhook/secrets": "^0.9.4",
     "sebastianfeldmann/camino": "^0.9.2",
     "sebastianfeldmann/cli": "^3.3",
-    "sebastianfeldmann/git": "^3.14",
+    "sebastianfeldmann/git": "^3.15.3",
     "symfony/console": "^2.7 || ^3.0 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
     "symfony/filesystem": "^2.7 || ^3.0 || ^4.0 || ^5.0 || ^6.0 || ^7.0",
     "symfony/process": "^2.7 || ^3.0 || ^4.0 || ^5.0 || ^6.0 || ^7.0"