chore: bump flasher dependency to v1.15.13

Author: yoeunes

composer.json

@@ -38,7 +38,7 @@
     "require": {
         "php": ">=5.3",
         "ext-mbstring": "*",
-        "php-flasher/flasher": "^1.15.12"
+        "php-flasher/flasher": "^1.15.13"
     },
     "minimum-stability": "stable",
     "prefer-stable": true,