[gjs: 1/2] docs: fix the distributions used for CI

[Philip Chimento <pchimento src gnome org>]

commit 80dec528d2318f553bbedfead3ad65da5ada625e
Author: Claudio André <claudioandre br gmail com>
Date:   Wed Jun 13 08:11:52 2018 -0300

    docs: fix the distributions used for CI
    
    [skip ci]

 README.md | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/README.md b/README.md
index 0bd01e0d..f8f84dbf 100644
--- a/README.md
+++ b/README.md
@@ -22,9 +22,8 @@ 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 8.1;
-- clang 6.0;
+- Ubuntu 18.04, Fedora 29 (devel), and Ubuntu 18.10 (devel);
+- gcc 7.3, gcc 8.1, and clang 6.0;
 - C/C++ and Javascript Linters;
 - Code Climate (https://codeclimate.com/);
 - ASAN (address sanitizer) and UBSAN (undefined behavior sanitizer);