Adds CHANGELOG entry for #154

CHANGELOG.md

@@ -6,10 +6,20 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Added
 
+- [#154](https://github.com/zendframework/zend-http/pull/154) adds the method `SetCookie::setEncodeValue()`. By default, Set-Cookie
+  values are passed through `urlencode()`; when a boolean `false` is provided to
+  this new method, the raw value will be used instead.
+
 - [#166](https://github.com/zendframework/zend-http/pull/166) adds support for PHP 7.3.
 
 ### Changed
 
+- [#154](https://github.com/zendframework/zend-http/pull/154) changes the behavior of `SetCookie::fromString()` slightly: if the parsed
+  cookie value is the same as the one passed through `urldecode()`, the
+  `SetCookie` header's `$encodeValue` property will be toggled off to ensure the
+  value is not encoded in subsequent serializations, thus retaining the
+  integrity of the value between usages.
+
 - [#161](https://github.com/zendframework/zend-http/pull/161) changes how the Socket and Test adapters aggregate headers. Previously,
   they would `ucfirst()` the header name; now, they correctly leave the header
   names untouched, as header names should be considered case-insensitive.