.travis.yml in rakuten_web_service-1.4.1 vs .travis.yml in rakuten_web_service-1.4.2

- old
+ new

@@ -1,10 +1,11 @@
 language: ruby
 rvm:
   - 2.1.10
-  - 2.2.5
-  - 2.3.1
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0
   - ruby-head
 
 cache: bundler
 
 before_install:
@@ -23,8 +24,8 @@
     repo_token:
       secure: Z23O936LoCDGJ/OyYsLzxTUI+CMWyrfeN1PtQdCNMdF4vxwaCsAHr3ulTdudGhKMrVZGENSEK6fq0Xal3o3oPaH9aGM9sUQ/ibRM+J94Lx6Owu4okTsIHoEy4vFeW+A/62aiwxPcoi7PFrvC8FOfaZg+b+vvYAQcitVe6qwBHiE=
 
 notifications:
   email: false
-  hipchat:
-    rooms:
-      secure: RYuIFjh/T6Hlj9nJ0RjmlTlES+9ZWcDNe1o2KRqMdH8cK1epIEgcEzMsFP6wKPRMQqOVw6Tu5gBMltDgu26sAW8HkTnMlzYtF6AVeOgsC6VVO9XzdaoVWWQX5J/Xn21vNV1vcncuOuMByz6dmzWngZv3T0u1mcvPje00EDNo27M=
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/059b85fcc75550b7bc39