Merge pull request #11 from pdffiller/update-qless-php-lib

Update qless-php library

Author: osadchyi-s

composer.json

@@ -16,7 +16,7 @@
     ],
     "require": {
         "ext-json": "*",
-        "pdffiller/qless-php": "3.8.2"
+        "pdffiller/qless-php": "3.9.1"
     },
     "require-dev": {
         "illuminate/events": "5.6.*|5.7.*",