Update PHP, monolog and datadog versions

Author: amooabeebadesina

README.md

@@ -5,7 +5,7 @@ PHP logger for all Buffer services
 
 ## Requirements
 
-PHP 7.1 and later.
+PHP 8.1 and later.
 
 ## Setup BuffLog in your PHP project via Composer
 

composer.json

@@ -1,14 +1,14 @@
 {
     "name": "bufferapp/php-bufflog",
     "description": "PHP log libraries for Buffer services",
-    "version": "0.2.0",
+    "version": "0.3.0",
     "require": {
-        "php": "^7.1",
-        "monolog/monolog": "^1.20",
-        "psr/log": "^1.1"
+        "php": ">=8.1",
+        "monolog/monolog": "^3.2",
+        "psr/log": "^3.0"
     },
     "require-dev": {
-        "datadog/dd-trace": "0.34.*"
+        "datadog/dd-trace": "0.82.*"
     },
     "autoload": {
         "psr-4": {