Merge branch 'master' into tomchristie-patch-1

diff --cc CHANGELOG.md
index 1d7a82a4c4e34167edbc5fee7ba61bcc397ef928,4e2afe2e621af9e0e82b8263af68bf6c681f4486..94ebae0afc5829aed9a36f3ad4484e2436731aee
--- 1/CHANGELOG.md
--- 2/CHANGELOG.md
+++ b/CHANGELOG.md
@@@ -4,10 -4,8 +4,10 @@@ All notable changes to this project wil
  
  The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
  
- ## [Unreleased]
+ ## 0.28.0 (...)
  
 +TODO... writeup `truststore` switch & 3.10+ requirement.
 +
  The 0.28 release includes a limited set of backwards incompatible changes.
  
  **Backwards incompatible changes**:

diff --cc README.md
Simple merge