Performance improvement for #513.

Author: Roman Syroeshko

CHANGELOG.md

@@ -9,7 +9,7 @@ This is the changelog between releases of PHPWord. Releases are listed in revers
 Place announcement text here.
 
 ### Changes
-
+- Improved performance of ``TemplateProcessor::setValue()``. - @RomanSyroeshko #513
 - Renamed ``align`` option of ``Paragraph`` style into ``alignment``. Note: accessor and mutator methods are renamed too. - @RomanSyroeshko
 
 ### Bugfixes