'spawn a fish' doesn't spawn anything

[Blueyescat]

Description

'spawn a fish' doesn't spawn anything, it should spawn a random fish.

Errors

None

Server Information

• Server version/platform: Paper 1.13.2
• Skript version: 2.3.6

[TheBentoBox]

This is somewhat an enhancement too, but yeah, we should be able to spawn supertypes to spawn a random sub-type.