Merge pull request #24 from vicgonvt/update_testbench

updates testbench to 5.0 and phpunit 9

Author: vicgonvt

composer.json

@@ -12,7 +12,7 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "orchestra/testbench": "^3.7"
+        "orchestra/testbench": "^5.0"
     },
     "autoload": {
         "psr-4" : {