Make the multiple event-values less strict

[TheLimeGlass]

Description

The pull request of #5769 makes Skript error when not defining an exact event value. After actively using it. I find it to be too strict.

This pull request eases the error warning to only happen to assignable types.

See unacceptable errors

Other

• dev/feature is not updated to master on skript-aliases, so this pull request is updating that to master.
• This is targetting 2.8 because this error handling was introduced in 2.8.

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Target Minecraft Versions: any
Requirements: none
Related Issues: none

[AyhamAl-Ali]

I think aliases update should be separated from this PR into its own with merging dev/patch to dev/feature as we do every so often due to our latest release model

[TheLimeGlass]

I think aliases update should be separated from this PR into its own with merging dev/patch to dev/feature as we do every so often due to our latest release model

It'll be hard to find the exact commit the master branch is on. We should make a GitHub action to keep the aliases updated on the dev/feature and dev/patch from master