Merge pull request #19 from ttrig/require-dev-phpunit

Make phpunit/phpunit a development requirement

Author: seregazhuk

composer.json

@@ -18,7 +18,6 @@
     "require": {
         "php": ">=7.2",
         "react/promise": "^2.7",
-        "phpunit/phpunit": "^8.2",
         "clue/block-react": "^1.3"
     },
     "autoload": {
@@ -32,6 +31,7 @@
         }
     },
     "require-dev": {
+        "phpunit/phpunit": "^8.2",
         "codeclimate/php-test-reporter": "^0.4.4"
     },
     "scripts": {