added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks the phase of the target Ender Dragon entity.
A list of valid phases can be found in the [Spigot Phase javadoc](https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/EnderDragon.Phase.html).
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| phase | p | A list of phases to match | |
## Examples
```yaml
Conditions:
- enderdragonphase{phase=CIRCLING} true
```
```yaml
Conditions:
- enderdragonphase{phases=FLY_TO_PORTAL,LEAVE_PORTAL} true
```
## Aliases
- [x] edragonPhase
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