Update composer.json

Author: ajdunn2

composer.json

@@ -5,15 +5,14 @@
     "license": "MIT",
     "require": {
         "php": ">=7.0",
-        "symfony/dom-crawler": "^3.0|^4.0",
+        "symfony/dom-crawler": "^4.0",
         "guzzlehttp/guzzle": "^6.3",
         "tightenco/collect": "^5.3",
         "nicmart/tree": "^0.2.7",
-        "spatie/browsershot": "^2.4"
+        "spatie/browsershot": "^3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.5",
-        "symfony/var-dumper": "^3.3"
     },
     "autoload": {
         "psr-4": {
@@ -36,7 +35,7 @@
     "config": {
         "preferred-install": "dist",
         "platform": {
-            "php": "7.0.0"
+            "php": "7.2.0"
         }
     }
 }