Update composer.json

Author: ajdunn2

composer.json

@@ -4,11 +4,11 @@
     "homepage": "https://github.com/ajdunn2/crawler",
     "license": "MIT",
     "require": {
-        "php": ">=7.0",
-        "symfony/dom-crawler": "^4.0",
-        "guzzlehttp/guzzle": "^6.3",
-        "tightenco/collect": "^5.3",
-        "nicmart/tree": "^0.2.7",
+        "php": ">=7.2",
+        "symfony/dom-crawler": "^4.0|^5.0",
+        "guzzlehttp/guzzle": "^6.5",
+        "tightenco/collect": "^6.0",
+        "nicmart/tree": "^0.3.1",
         "spatie/browsershot": "^3.0"
     },
     "require-dev": {
@@ -33,9 +33,6 @@
         }
     },
     "config": {
-        "preferred-install": "dist",
-        "platform": {
-            "php": "7.2.0"
-        }
+        "preferred-install": "dist"
     }
 }