Add CHANGELOG.md

Author: devanych

CHANGELOG.md

@@ -1,6 +1,5 @@
-# HTTP ___ Change Log
+# HTTP Error Handler Change Log
 
 ## 1.0.0 - under development
 
 - Initial stable release.
-- [#44](https://github.com/laminas/laminas-diactoros/pull/44) fixes an issue whereby the uploaded file size was being provided as an integer string, and causing type errors. The value is now cast to integer before creating an `UploadedFile` instance.