enable memcached on travis

Someguy123 · Someguy123 · commit 91f40c78f432 · 2019-12-13T09:23:22.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 dist: bionic
 services:
   - redis-server
+  - memcached
 language: python
 cache: pip
 python:
