New wandering trader trades

I think it would be cool if wandering traders sold these things

1: 1 Emerald-----5 Firework rockets            Stock: 10

2: 3 Emeralds-----1 Village explorer map    Stock: 1

3: 1 Emerald-----1 Scute                              Stock: 3

4: 1 Emerald-----1 Phantom membrane       Stock: 2

5: 2 Emeralds-----16 Snowballs                   Stock: 5