Merge pull request #7 from Gymnasiast/patch-2

Lower PHP version requirement to 7.0

Author: iamgergo

composer.json

@@ -20,7 +20,7 @@
         }
     },
     "require": {
-        "php" : "^7.1"
+        "php" : "^7.0"
     },
     "require-dev": {
         "orchestra/testbench":"~3.8.0"