Release v5.1.3 (#184)

Author: applejag

CHANGELOG.md

@@ -12,7 +12,7 @@ This project tries to follow [SemVer 2.0.0](https://semver.org/).
 	https://changelog.md/
 -->
 
-## v5.1.3 (WIP)
+## v5.1.3 (2022-05-05)
 
 - Changed automatic JSON indentation in HTTP responses based on the user agent,
   so it no longer automatically indents for desktop, mobile, or tablet devices.