[gjs: 1/2] docs: advertise about CI

[Philip Chimento <pchimento src gnome org>]

commit 99a348b50a3515f210ddff0c5a72313db2d8fa6d
Author: Claudio André <claudioandre br gmail com>
Date:   Sun May 6 14:18:57 2018 -0300

    docs: advertise about CI
    
    [skip ci]

 README.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
---
diff --git a/README.md b/README.md
index e991af18..0fb7be36 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,22 @@ GNOME Documents, and many other apps.
 Wiki: https://wiki.gnome.org/action/show/Projects/Gjs
 
 How to build and run if you want to contribute to GJS: see doc/Hacking.md
+
+#### Testing
+
+Our CI (continuous integration) testing scheme stresses the source code using:
+- Fedora 27, Ubuntu 18.04, Fedora 29 (devel), and Ubuntu 18.10 (devel);
+- gcc 7.3 and gcc 8.0;
+- clang 6.0;
+- C/C++ and Javascript Linters;
+- Code Climate  (https://codeclimate.com/);
+- ASAN (address sanitizer) and UBSAN (undefined behavior sanitizer);
+- Valgrind (https://en.wikipedia.org/wiki/Valgrind);
+- Code Coverage (https://en.wikipedia.org/wiki/Code_coverage);
+- Text only and graphics builds;
+- Profiler enabled and disabled builds;
+- And DevOps with Flatpak.
+
+## License
+
+Dual licensed under LGPL 2.0+ and MIT.