We've seen those reports as well and are still investigating fully, but for now, I don't think there will be major impacts to our integration.
Back in May with the 8.0 release of JFBConnect, we switched the authentication method we were using with Google from the Google+ API to the newer (generic) Google API (non-plus). To our knowledge, the non-plus Google API is not going away in any form and it's the authentication method for almost all of Google properties (GSuite, GMail, YouTube, etc). The biggest thing we need to change is the icon from the red Google+ to something more Google-generic.
Again, this is new news, and Google has said it will be a gradual shutdown over the next year or so, and you can bet we'll be watching closely and adjusting as necessary.
Thanks,
Alex