Can't install on ubuntu 17.04

```
sudo gem install github_changelog_generator
Building native extensions. This could take a while...
ERROR: Error installing github_changelog_generator:
ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.2/ext
/usr/bin/ruby2.3 mkrf_conf.rb

current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.2/ext
/usr/bin/ruby2.3 -rubygems /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake RUBYARCHDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2 RUBYLIBDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2
/usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError)

rake failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/rainbow-2.2.2 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2/gem_make.out
```

I did `sudo apt-get install ruby-dev` and `sudo apt-get install zlib1g-dev` like referred [here](https://github.com/skywinder/github-changelog-generator/issues/64) without success.

Thanks.

Start by reproducing `sudo gem install github_changelog_generator` on Ubuntu 17.04 with Ruby 2.3 and inspect the reported `rainbow` native-extension and missing `rake` paths. Compare the dependency and installation requirements with the referenced issue; done means the gem installs successfully or the supported setup and failure cause are documented.

Written by the indexing model from the issue text.