Release v1.8 (#99)

To pick up #96.

GUS-W-10346716.

Author: edmorley

changelog.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.x] - 2022-0x-0x
+## [1.8] - 2022-05-19
 ### Changes
 - [heroku-18] updated nginx to 1.20.2, bump zlib to 1.2.12, updated PCRE to 8.45
 - [heroku-20] updated nginx to 1.20.2, bump zlib to 1.2.12, updated PCRE to 8.45