Finish GridSearch Color Plot

[bbengfort]

@pbs929 completed a GridSearch Visualizer as per #12 in #261 but there are still a couple of steps to get this fully completed.

Note to contributors: items in the below checklist don't need to be completed in a single PR; if you see one that catches your eye, feel to pick it off the list!

• [ ] create a test file and test stubs
• [ ] complete integration tests with basic visualizations
• [ ] update documentation with model selection visualizers

[bbengfort]

See also: https://github.com/jmcarpenter2/parfit/blob/master/examples/parfit_ex.ipynb

[saurabhdaalia]

@bbengfort , Hey!! I am interested in working on this issue. It will be a great learning experience for me, I hope. I am new to yellowbrick code base. It would be really great if you can help me with where can I start with for this particular issue Thank you!!

[lwgray]

Hi @saurabhdaalia Thanks for taking interest in Yellowbrick. However @bbengfort is going to be away for the next couple of weeks. You are welcome to open a pull request to address the issue. I encourage you to check out the contributor’s guide for our conventions around branching, API, testing, etc https://www.scikit-yb.org/en/develop/contributing/index.html If you don't hear back from us in a couple of weeks just give us another ping. We look forward to your contribution.