Add tox dependency for caplog test fixture.

cbe1f817 · jcass · de050739 · cbe1f817
Commit cbe1f817 authored Nov 30, 2015 by jcass
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ deps =
    mopidy==dev
    pytest
    pytest-cov
+    pytest-capturelog
    pytest-xdist
    tornado >= 4
    vcrpy