chore(composer): try for php5.6

adhocore · adhocore · commit 4f654b5739fb · 2021-04-05T19:02:59.000+07:00
diff --git a/composer.json b/composer.json
@@ -27,7 +27,7 @@
         "ext-ctype": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5 || ^7.5 || ^8.5"
+        "phpunit/phpunit": "^5.5 || ^6.5 || ^7.5 || ^8.5"
     },
     "scripts": {
         "test": "phpunit",
