Allow the installation on php 8.

derrabus · nicolas-grekas · commit e9c470956029 · 2020-10-14T19:47:37.000+02:00
diff --git a/composer.json b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^5.5.9|^7.0.0",
+        "php": ">=5.5.9",
         "composer-plugin-api": "^1.0|^2.0"
     },
     "autoload": {
