druid: update for shadowlands

[luukvbaal]

Hi, I've been enjoying using this addon but finally got fed up with some of the missing data for my class since shadowlands, so I thought I would take a stab at updating it.

I also added rules for the covenant abilities Fleshcraft and Soulshape here in Common.lua, and Door of Shadows in AdiAddons/LibPlayerSpells-1.0#156.

[Rainrider]

I removed the coventant related common rules and added those in LibPlayerSpells-1.0@c055234fec3a866a0a365afed2bfc2dba4edd552 . Soulshape's actual buff id depends on the chosen form and there are 27 of those, so the rule is working for the base form only for now (I don't see much benefit of adding all of those, you might create a custom rule for your toon for your specific buff combination though).

Thank you for your contribution, much appreciated.

[luukvbaal]

Thanks for the fixes and merging!