gevent: requires ares.h (libc-ares)

Yoan Blanc · Yoan Blanc · commit fdfae47d0ee8 · 2018-05-21T21:33:27.000+02:00
Signed-off-by: Yoan Blanc &lt;yoan.blanc@exoscale.ch&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -17,6 +17,7 @@ addons:
     - build-essential
     - python-dev
     - pypy-dev
+    - libc-ares-dev
     - libev4
     - libev-dev
 
