.travis.yml in etcdv3-0.5.2 vs .travis.yml in etcdv3-0.6.0

- old
+ new

@@ -4,10 +4,10 @@
   - 2.2
   - 2.0
 
 env:
   global:
-    - ETCD_VERSION=v3.1.4
+    - ETCD_VERSION=v3.1.6
 
 install:
     - bundle install
     - wget https://github.com/coreos/etcd/releases/download/$ETCD_VERSION/etcd-$ETCD_VERSION-linux-amd64.tar.gz -O etcd.tar.gz --no-check-certificate
     - tar zxvf etcd.tar.gz