Use paquettg/php-html-parser, support PHP 7.3+

Author: adriangonzales

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "filipegar/inky",
     "description": "PHP Implementation of ZURB's Foundation for Email parser (Inky)",
-    "version":     "1.3.7",
+    "version":     "1.3.8",
     "license": "MIT",
     "authors": [
         {
@@ -14,16 +14,16 @@
         }
     ],
     "require-dev": {
-      "phpunit/phpunit": "^6.5"
+      "phpunit/phpunit": "^9.0"
     },
     "autoload": {
         "psr-4": {
           "Hampe\\Inky\\": "src/"
         }
     },
     "require": {
-        "php": ">=7.0",
-        "thesoftwarefanatics/php-html-parser": "^1.8"
+        "php": ">=7.3",
+        "paquettg/php-html-parser": "^3.0"
     },
     "replace": {
         "thampe/inky": "self.version"