[interchange] have Travis run prove for unit tests

[Josh Lavin]

commit 420086ae6a8d08beb858e11b3b562ac5ccf64537
Author: Josh Lavin <jlavin at endpoint.com>
Date:   Wed Jul 20 15:58:01 2016 -0700

    have Travis run prove for unit tests

 .travis.yml |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.travis.yml b/.travis.yml
index 11b15b9..48a8c4a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,7 @@ script:
   - perl Makefile.PL force=1 PREFIX=/home/travis/interchange
   - make
   - perl test.pl
+  - prove -rlv
   - make install
   - mkdir /home/travis/catalogs
   - cp -r /home/travis/interchange/strap /home/travis/catalogs/