[smuxi: 115/179] Travis-CI: add Mono 3.2.8, 4.2.1 and 4.6.1

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit 65b392d84762c42aafcd0eb2c0007b917d3fd7c2
Author: Mirco Bauer <meebey meebey net>
Date:   Sat Nov 12 20:54:57 2016 +0800

    Travis-CI: add Mono 3.2.8, 4.2.1 and 4.6.1
    
    Add all Mono versions shipped by Debian stable and Ubuntu LTS releases

 .travis.yml |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/.travis.yml b/.travis.yml
index 7f581c3..785a3ff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,9 +5,12 @@ before_install:
 
 mono:
     - latest
+    - 4.6.1
     - 4.2.3
+    - 4.2.1
     - 4.0.0
     - 3.12.0
+    - 3.2.8
     - 2.10.8
 
 install: