fix namespace issues and update composer.json file

Author: dvlpr1996

composer.json

@@ -1,18 +1,20 @@
 {
     "name": "dvlpr1996/php-string-helpers",
-    "description": "some useful php string helpers",
+    "description": "Some Useful Php String Helper Methods",
     "keywords": [
         "php",
         "string",
         "helpers",
-        "php-string-helpers"
+        "helper-methods",
+        "php-string-helpers",
+        "php-string-helpers-method"
     ],
     "homepage": "https://github.com/dvlpr1996/php-string-helpers",
     "license": "MIT",
     "type": "library",
     "authors": [
         {
-            "name": "Nima",
+            "name": "Nima jahan bakhshian",
             "email": "nimajahanbakhshian@gmail.com",
             "role": "Developer"
         }
@@ -22,23 +24,23 @@
         "source": "https://github.com/dvlpr1996/php-string-helpers"
     },
     "require": {
-        "php": "^8.0"
+        "php": "^8.1"
     },
     "require-dev": {
         "symfony/var-dumper": "^6.0",
         "phpunit/phpunit": "^9.5"
     },
     "autoload": {
         "psr-4": {
-            "PhpStringHelpers\\": "src/"
+            "dvlpr1996\\PhpStringHelpers\\": "src/"
         },
         "files": [
             "./src/PhpStringHelpers.php"
         ]
     },
     "autoload-dev": {
         "psr-4": {
-            "PhpStringHelpers\\Tests\\": "tests/"
+            "dvlpr1996\\PhpStringHelpers\\Tests\\": "Tests/"
         }
     },
     "scripts": {