Accomodate for Add or RemoveReplicatedLooseGameplayTags removal in 5.7 #
Small fix to make plugin compile on 5.7
Add and RemoveReplicatedLooseGameplayTags has been removed in 5.7
Note: Can't use UE_VERSION_NEWER_THAN_OR_EQUAL yet as it was introduced in 5.6 (https://github.com/EpicGames/UnrealEngine/blob/5.6.1-release/Engine/Source/Runtime/Core/Public/Misc/EngineVersionComparison.h), so can't rely on it until 5.5 is out of support (in 5.8)