FEATURE - Expose Grunt Option Keys for Ease of Use

[brian-lim-42]

Expose grunt option keys for use with grunt tasks

Example use case : saving all current options to json, for developer preferences

grunt.registerTask('gen', 'Generate based on last settings', function () {
// TODO
});

[jsf-clabot]

All committers have signed the CLA.

[shama]

Thanks for the PR @bhldev! This LGTM 👍

Will leave open for other contributors to weigh in. This should go into the next minor version.

[brian-lim-42]

Hello,
Can this be approved and merged?
Thanks,
~ B