Attempt to convert the non UTF-8 strings to UTF-8

src/Spout/Common/Exception/EncodingConversionException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Box\Spout\Common\Exception;
+
+/**
+ * Class EncodingConversionException
+ *
+ * @package Box\Spout\Common\Exception
+ */
+class EncodingConversionException extends SpoutException
+{
+}