update changelog

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@@ -1,5 +1,26 @@
+# ChangeLog v4
+
+## 4.0.0beta1
+
+* PHP 8 compatibility
+       - Drop ext-propro support:  
+               PHP 8 removes the object get/set API from the ZendEngine, which renders
+               that extension dysfunctional. As a consequence, the header property of
+               http\Message and derived classes cannot be modified in place, and thus
+               by reference.
+
 # ChangeLog v3
 
+## 3.2.3, 2019-10-29
+
+* Fixed Windows build (Jan Ehrhardt)
+
+## 3.2.2, 2019-10-24
+
+* PHP-7.4 compatibility
+* Fixed gh-issue #92: http\Message\Body::addForm() discards numeric names
+* Fixed gh-issue #95: typo in http\Message::getResponseCode()'s error message
+
 ## 3.2.1, 2019-06-07
 
 * Fixed gh-issue #88: Unable to run test suite (Remi Collet)
@@ -172,4 +193,3 @@ PHP7 compatible release based on the 2.5.x series with the following backwards i
 
 PHP7 compatible release based on the 2.5.x series with the following backwards incompatible changes:
 - removed http\Url::FROM_ENV from the default flags of the http\Url constructor, use http\Env\Url instead
-