Support for shape style ending with `;`

Valid CSS style can end with `;` and that is the case for some 3rd party
software such as WPS Office.

Closes #304

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Better auto-detection of CSV separators - [#305](https://github.com/PHPOffice/PhpSpreadsheet/issues/305)
+- Support for shape style ending with `;` - [#304](https://github.com/PHPOffice/PhpSpreadsheet/issues/304)
 
 ## [1.0.0] - 2017-12-25
 

src/PhpSpreadsheet/Reader/Xlsx.php

@@ -2157,7 +2157,7 @@ class Xlsx extends BaseReader
 
     private static function toCSSArray($style)
     {
-        $style = str_replace(["\r", "\n"], '', $style);
+        $style = trim(str_replace(["\r", "\n"], '', $style), ';');
 
         $temp = explode(';', $style);
         $style = [];