Lock in dependency versions

Author: ivanvermeyen

composer.json

@@ -23,11 +23,11 @@
         "php": "^7.1",
         "0.0.0/composer-include-files": "^1.5",
         "codezero/laravel-localizer": "^1.1",
-        "illuminate/support": ">=5.6"
+        "illuminate/support": "^5.6|^6.0"
     },
     "require-dev": {
         "mockery/mockery": "^1.3",
-        "orchestra/testbench": ">=3.6",
+        "orchestra/testbench": "^3.6|^4.0",
         "phpunit/phpunit": "^7.0|^8.0"
     },
     "scripts": {