.travis.yml in terraforming-0.13.0 vs .travis.yml in terraforming-0.13.1

- old
+ new

@@ -8,9 +8,12 @@
   global:
     - secure: n0mxwnyjuXI4mJO4mp++2TnsPJ+XgCF/J1U2L5piE5j3xMhSU+5V0JrA1uFlS0Pemb44M7BjgmF9S4G35BwyAQpctpCYhqy9tFa6+Y6nxEv5hCv2cZz7BSAZM6eb+zq20409hxTHRaQOr1DBeE4R5S2PrmOXRqvYfTRv3LNSLFk=
   matrix:
     - OJ=0
     - OJ=1
+before_install:
+  - gem update --system
+  - gem update bundler
 before_script:
   - if [[ $OJ -eq 1 ]]; then gem install oj; fi
 notifications:
   slack:
     secure: iTI8zpxXQJqf5e9ix4buLRsGlf9lJRZqA9Fawdqm41msBrC0Zsp31XzBS7ZPiTcdHhImtOC4lccTCW2C8kR6waaG5VOF0U2BwyKaNFKsXMaVk6yrNhYkvJ9YVicuU9hL+JKLyBrSDYQ7+vXcHqaz4H4dYpPThrv6sfq4jBOp+eM=