chore(composer): remove php constraint [fixes #12]

adhocore · web-flow · commit 89eb730f3ec3 · 2018-10-26T11:08:11.000+05:45
diff --git a/composer.json b/composer.json
@@ -11,7 +11,6 @@
         }
     ],
     "require": {
-        "php": ">=7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.5"
