fix verbosity

Author: erickhun

example.php

@@ -3,6 +3,7 @@
 
 use Buffer\Bufflog;
 
+// putenv("LOG_VERBOSITY=WARNING");
 Bufflog::debug("I am a debug");
 Bufflog::debug("I am a debug with context", ["my key" => " my value"]);
 

src/php-bufflog/BuffLog.php

@@ -118,10 +118,9 @@ private static function createLogger()
     private static function setVerbosity()
     {
         $envVerbosity = getenv("LOG_VERBOSITY");
-        if ($envVerbosity !== FALSE && array_key_exists($envVerbosity, self::$verbosityList )) {
-            self::$currentVerbosity = getenv("LOG_VERBOSITY");
+        if ($envVerbosity !== FALSE && array_key_exists($envVerbosity, self::$verbosityList)) {
+            self::$currentVerbosity = self::$verbosityList[$envVerbosity];
         }
-        echo "Log verbosity set to " . self::$verbosity;
     }
 
     public static function getLogger()