.travis.yml in textbringer-0.3.0 vs .travis.yml in textbringer-0.3.1

@@ -2,31 +2,31 @@
 matrix:
   include:
     - os: linux
       dist: trusty
       sudo: false
-      rvm: 2.3.5
+      rvm: 2.4.5
     - os: linux
       dist: trusty
       sudo: false
-      rvm: 2.4.3
+      rvm: 2.5.2
     - os: linux
       dist: trusty
       sudo: false
-      rvm: 2.5.0
+      rvm: 2.6.0
     - os: linux
       dist: trusty
       sudo: false
       rvm: ruby-head
     - os: osx
       osx_image: xcode8.2
-      rvm: 2.3.5
+      rvm: 2.4.5
     - os: osx
       osx_image: xcode8.2
-      rvm: 2.4.3
+      rvm: 2.5.2
     - os: osx
       osx_image: xcode8.2
-      rvm: 2.5.0
+      rvm: 2.6.0
     - os: osx
       osx_image: xcode8.2
       rvm: ruby-head
   allow_failures:
     - os: osx