Loosen restrictions to PHP 5.6 or PHP 7

Author: chadicus

composer.json

@@ -21,8 +21,8 @@
     ],
     "license": "MIT",
     "require": {
-        "php": "^7.0",
-	"mongodb/mongodb": "^1.0.0"
+        "php": "^5.6 || ^7.0",
+	    "mongodb/mongodb": "^1.0.0"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "~2.0",