Update composer.json

Author: ams-ryanolson

composer.json

@@ -38,7 +38,7 @@
     "require-dev": {
         "fakerphp/faker": "~1",
         "mockery/mockery": "0.9.*|^1.0",
-        "phpunit/phpunit": "~7.0|^8.0|^9",
+        "phpunit/phpunit": "~7.0|^8.0|^9|^10.0",
         "orchestra/testbench": "3.6|^4.0|^5.0|^6.0|^8.0"
     },
     "autoload": {