.travis.yml in jekyll-html-1.0.0 vs .travis.yml in jekyll-html-1.0.1

@@ -1,15 +1,15 @@
-sudo: false
-language: ruby
-
-before_install:
-  - gem install bundler -v 1.16.0
-
-matrix:
-  include:
-    - rvm: 2.4.2
-    - rvm: 2.3.5
-    - rvm: 2.2.8
-    - rvm: 2.1.10
-
-notfications:
-  email: false
+sudo: false
+language: ruby
+
+before_install:
+  - gem update --system
+
+matrix:
+  include:
+    - rvm: 2.5.0
+    - rvm: 2.4.3
+    - rvm: 2.3.6
+    - rvm: 2.2.9
+
+notfications:
+  email: false