Update dependencies

Author: phpfui

.gitignore

@@ -5,3 +5,5 @@ infection.log
 .idea/
 .php_cs.cache
 *.swp
+.phpunit.result.cache
+.php-cs-fixer.cache

composer.json

@@ -17,21 +17,21 @@
         "ext-mbstring": "*",
         "ext-zlib": "*",
         "ext-curl": "*",
-        "paquettg/string-encode": "~1.0.0",
+        "paquettg/string-encode": "^2.0",
         "php-http/httplug": "^2.1",
         "guzzlehttp/guzzle": "^7.0",
-        "guzzlehttp/psr7": "^1.6",
-        "myclabs/php-enum": "^1.7"
+        "guzzlehttp/psr7": "^2.0",
+        "myclabs/php-enum": "^1.8",
+        "psr/http-client": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.5.1",
+        "phpunit/phpunit": "^7.5.1 || ^8.0 || ^9.0",
         "mockery/mockery": "^1.2",
-        "infection/infection": "^0.13.4",
-        "phan/phan": "^2.4",
-        "friendsofphp/php-cs-fixer": "^2.16"
+        "friendsofphp/php-cs-fixer": "^3.0",
+        "phan/phan": "^5.2"
     },
     "autoload": {
-        "psr-4": { 
+        "psr-4": {
         	"PHPHtmlParser\\": "src/PHPHtmlParser"
        	}
     }