Allow filtering by several values

[lambda2]

For example, GET api/plants?max_height=4.0 would return any plants up to 4.0 feet.

And GET api/plants?flower_color=Red,Pink would return any plants with Red or Pink flowers.

[tabuckner]

+1 on this one!

I dropped a question into Slack about something similar.

My specific use case was to get all plants with a minimum temperature that is >= the query param value. However, filtering by range would solve that problem and be more generic.

That said--if my request is easier, I selfishly want that! 😜

I'm happy to make a PR--I just can't find the repo.