Update composer.json

Author: theupriser

composer.json

@@ -21,7 +21,7 @@
     },
     "require-dev": {
         "orchestra/testbench-browser-kit": "~3.4|~3.8|~4.0|^7.12|^8.5",
-        "phpunit/phpunit": "6.0.*|^8.0|^9.5.10`|^10.0"
+        "phpunit/phpunit": "6.0.*|^8.0|^9.5.10|^10.0"
     },
     "suggest": {
         "ext-intl": "*"