Update dependency version constraints

Author: ivanvermeyen

composer.json

@@ -22,10 +22,10 @@
     "require": {
         "php": "^7.1",
         "0.0.0/composer-include-files": "^1.5",
-        "illuminate/support": "^5.6|^6.0"
+        "illuminate/support": ">=5.6"
     },
     "require-dev": {
-        "orchestra/testbench": "3.6.*|^4.0",
+        "orchestra/testbench": ">=3.6",
         "phpunit/phpunit": "^7.0|^8.0"
     },
     "scripts": {