installed_versions breaks when xcode 7.3.x installed on OSX10.10

[lacostej]

If you install xcode 7.3.x on MacOSX 10.10, xcode-install breaks.

$ xcversion list
Executable requires at least OS X 10.11, but is being run on OS X 10.10.5, and so is exiting./Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:480:in `fetch_version': undefined method `split' for nil:NilClass (NoMethodError)
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:431:in `version'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:70:in `block in installed_versions'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:69:in `sort'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:69:in `installed_versions'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:138:in `list_annotated'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install.rb:146:in `list_current'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/lib/xcode/install/list.rb:22:in `run'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/claide-1.0.0/lib/claide/command.rb:334:in `run'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/gems/xcode-install-2.0.2/bin/xcversion:12:in `<top (required)>'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/bin/xcversion:23:in `load'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/bin/xcversion:23:in `<main>'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/bin/ruby_executable_hooks:15:in `eval'
        from /Users/Shared/Jenkins/Home/.rvm/gems/ruby-2.2.4/bin/ruby_executable_hooks:15:in `<main>'````