Do not require php8.0 for dev.

GhaziTriki · GhaziTriki · commit bae7b32f7111 · 2021-06-11T21:48:11.000+01:00
diff --git a/composer.json b/composer.json
@@ -29,7 +29,6 @@
     "ext-mbstring": "*"
   },
   "require-dev": {
-    "php": ">=8.0",
     "ext-mbstring": "*",
     "composer/composer": "^1.10.0",
     "phpunit/phpunit": "^8",
