.travis.yml in urlscan-0.4.1 vs .travis.yml in urlscan-0.5.0

@@ -1,9 +1,6 @@
 sudo: false
 language: ruby
 cache: bundler
 rvm:
-  - 2.5
   - 2.6
-before_install:
-  - gem update --system
-  - gem install bundler
+before_install: gem install bundler -v 2.1