.travis.yml in bundleup-0.9.0 vs .travis.yml in bundleup-1.0.0

@@ -10,7 +10,7 @@
 - 2.5.7
 - 2.6.5
 - 2.7.0
 - ruby-head
 before_install:
-- gem install bundler -v 2.1.3 --conservative --no-document
+- gem install bundler -v 2.1.4 --conservative --no-document
 - gem install executable-hooks --conservative --no-document