Add changelog for v1.11.3 (#10700) (#10708)

* Add changelog for v1.11.3

* Apply suggestions from code review

* Update CHANGELOG.md

Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: Antoine GIRARD <sapk@users.noreply.github.com>
Co-authored-by: Lauris BH <lauris@nix.lv>

CHANGELOG.md

@@ -4,6 +4,13 @@ This changelog goes through all the changes that have been made in each release
 without substantial changes to our git log; to see the highlights of what has
 been added to each release, please refer to the [blog](https://blog.gitea.io).
 
+## [1.11.3](https://github.com/go-gitea/gitea/releases/tag/v1.11.3) - 2020-03-10
+
+* BUGFIXES
+  * Prevent panic in stopwatch (#10670) (#10673)
+  * Fix bug on pull view when required status check no ci result (#10648) (#10651)
+  * Build explicitly with Go 1.13 (#10684)
+
 ## [1.11.2](https://github.com/go-gitea/gitea/releases/tag/v1.11.2) - 2020-03-06
 
 * BREAKING