[gimp-macos-build] Add circle ci to the links

[Alex Samorukov <asamorukov src gnome org>]

commit e4b89d1a05108541ac302600b4bcc7e9799e6572
Author: Alex Samorukov <samm os2 kiev ua>
Date:   Thu Nov 7 09:15:56 2019 +0100

    Add circle ci to the links

 README.md | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/README.md b/README.md
index fb8ef41..7b312a4 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ I was able to get working builds in the VirtualBox VM, it works stable enough fo
 
  - [Gtk-OSX](https://gitlab.gnome.org/GNOME/gtk-osx/) project to simplify building MacOS application bundles 
for Gtk+-based applications
  - [gimp-plugins-collection](https://github.com/aferrero2707/gimp-plugins-collection) -        GMIC, 
LiquidRescale, NUFraw, PhFGimp and ResynthesizerPlugin GIMP plugin builds, including macOS version
+ - CircleCI [gimp-macos-build project](https://circleci.com/gh/GNOME/gimp-macos-build)
 
 ## Known bugs and limitations (merge requests are welcome!)