Add a way to disable text wrapping through the api (Fix #247) (#311)

* Add a way to disable text wrapping (Fix #247)
* Fix PHPDoc boolean notation
* Fix PHPDoc param notation

src/Spout/Writer/Common/Helper/AbstractStyleHelper.php

@@ -122,7 +122,7 @@ abstract class AbstractStyleHelper
     protected function applyWrapTextIfCellContainsNewLine($style, $dataRow)
     {
         // if the "wrap text" option is already set, no-op
-        if ($style->shouldWrapText()) {
+        if ($style->hasSetWrapText()) {
             return $style;
         }