I'd be nice to pass custom flags to the gem provider to uninstall ruby gems.
The `uninstall_options` attribute within the package resource can be set and consumed by the uninstall method within the gem provider in order to achieve this goal.
This resource results in the following command to be issued:
/usr/bin/gem uninstall --executables --all --ignore-dependencies mechanize
Please note that the ['--executables', '--all'] flags are added to the `gem uninstall` command by default.