Merge pull request #44 from mpscholten/fix-exceptions

Fixed `InvalidValueException` being thrown instead of `NotFoundException`

src/AbstractValueParser.php

@@ -55,7 +55,7 @@ public function required($invalidValueMessage = null, $notFoundMessage = null)
                 $notFoundMessage = $this->config->getExceptionMessageFactory()->createNotFoundMessage($this->name);
             }
 
-            throw $this->config->getExceptionFactory()->createInvalidValueException($notFoundMessage);
+            throw $this->config->getExceptionFactory()->createNotFoundException($notFoundMessage);
         }
 
         return $this->value;