Please read the Changelog, if you look around this has been addressed multiple times already:
Your problem is also clear in the error message you have posted. The version of simple:rest and cultofcoders:grapher that you want to use want to use accounts-base v1.x, while the rest of the codebase want to use accounts-base v2. Since this is a major version bump it won’t be allowed.
Sometimes if you are updating from old versions, you’ll need to do two things:
Delete .meteor/versions file
Go through .meteor/packages and remove the @X.X.X versions from the end of package names.
The meteor package constraint resolution system is not always helpful, and sometimes gets in it’s own way. I really wish Meteor would dump it, and go with npm, so that we don’t have two different module resolution systems any more.