Update .travis.yml for build config

Author: DominikAlberski

.travis.yml

@@ -28,3 +28,5 @@ jobs:
         bundler: false
       script: make ship
       if: (branch = master and type = push ) OR commit_message =~ /ship:docker/ OR env(SHIP_DOCKER) = true
+before_install:
+  - gem install rubygems-update -v 3.4.22