Travis: Update Bundler instead of gem

Author: olleolleolle

.travis.yml

@@ -9,7 +9,7 @@ rvm:
   - jruby-9.1.13.0
   - jruby-head
 before_install:
-  - gem update --system
+  - gem install bundler
 branches:
   only:
     - master

therubyrhino_jar.gemspec

@@ -13,10 +13,9 @@ Gem::Specification.new do |s|
   s.license = "MPL-2.0"
 
   s.homepage = %q{http://github.com/cowboyd/therubyrhino}
-  s.rubyforge_project = %q{therubyrhino}
 
   s.require_paths = ["jar"]
   s.files = `git ls-files`.split("\n").sort.
     select { |file| file == 'therubyrhino_jar.gemspec' || file =~ /^jar\// }
 
-end
+end