[smuxi: 5/37] travis: install libnunit-cil-dev manually to fix build with new Mono

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

commit 6508f97645e424c75c46ba8809db7c54d009f783
Author: Andres G. Aragoneses <knocte gmail com>
Date:   Mon Jan 13 23:32:11 2020 +0800

    travis: install libnunit-cil-dev manually to fix build with new Mono
    
    Newer versions of Mono such as 6.6.x don't provide NUnit anymore so the
    package needs to be installed separately, otherwise the build fails like
    it was happening for the master branch in its latest commit:
    
    d4cfb71d70cadd8a9fd218e2089f1e32ad149c63
    
    Whose build log was:
    
    https://travis-ci.org/meebey/smuxi/builds/627714687?utm_source=github_status&utm_medium=notification
    
    A pkg-config check was also added in the configure script, here:
    44ab327f546f57c98c7e0c8f00093f08b4769aeb

 .travis.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.travis.yml b/.travis.yml
index ca59a921..21c5841b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,7 @@ install:
     - sudo apt-get install devscripts equivs > /dev/null
     - sudo mk-build-deps --install debian/control > /dev/null
     - sudo apt-get install mono-devel nunit-console moreutils gtk-sharp2-gapi libgtkspell-dev > /dev/null
+    - sudo apt-get install libnunit-cil-dev > /dev/null
 
 script:
     - set -e