prepare_travis_env.sh in dynflow-0.8.10

- old
+ new

@@ -29,7 +29,7 @@
 
 if [ "$CONCURRENT_RUBY_EXT" = "true" ]; then
   echo "Enabling concurrent-ruby-ext"
   sed -i 's/:concurrent_ruby_ext//'g $BUNDLE_CONFIG
 fi
-
+gem update bundler
 bundle install