Multiple filters

[micppp]

Add the ability for people to filter by more than one filter at a time.

Idea

Store the filters as an array in state.

state = {
  filters: ["sinnoh", "5km", "10km"]
}

This would then find all pokemon from the sinnoh region that appear in both 5km and 10km eggs.

Not sure if thats the best structure to go with or whether an object containing each option as a key with arrays of values.