added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks against the spawn reason of the target(s)
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| reason | r | The reason to check for. Can be any of the [Bukkit][] ones |<!--type:SpawnReason--> |
## Examples
In this example, the skill will apply a glow effect to the target entity if it has been spawned because of a raid
```yaml
ExampleSkill:
TargetConditions:
- spawnReason{reason=RAID} true
Skills:
- potion{t=GLOWING;d=100;l=0}
```
[Bukkit]: https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/event/entity/CreatureSpawnEvent.SpawnReason.html
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