Caroline Brew editor Stephen King’s 1983 novel “Pet Sematary” has been adapted several times for film, beginning with Mary Lambert’s 1989 version. That was followed by its 1992 sequel, then by Dennis Widmyer and Kevin Kölsch’s 2019 adaptation — and now, there’s “Pet Sematary: Bloodlines,” directed and co-written by Lindsey Anderson Beer. What sets Beer’s version apart from the others is that hers is a prequel, with the intention to answer some of the unknowns about the “Pet Sematary” universe, rather than just tell a different version of the same story.