Remove PHP Constraint

We want to allow PHP 8+ I think it's just better

Author: joehoyle

composer.json

@@ -10,7 +10,6 @@
  }
  ],
  "require": {
- "composer/installers": "~1.0",
- "php": "^5.6.0||^7.0"
+ "composer/installers": "~1.0"
  }
 }