update Compat for rename of Pkg to OldPkg

also temporarily disable the Project file while things are in flux

Author: KristofferC

Project.toml renamed to __Project.toml

@@ -1452,9 +1452,9 @@ else
 end
 
 @static if VERSION < v"0.7.0-DEV.3656"
-    const Pkg = Base.Pkg
+    const OldPkg = Base.Pkg
 else
-    import Pkg
+    import OldPkg
 end
 
 @static if VERSION < v"0.7.0-DEV.3630"

src/Compat.jl

@@ -52,6 +52,8 @@ else
     import Base.LinAlg.BLAS.@blasfunc
 end
 
+Base.@deprecate_binding Pkg OldPkg
+
 if VERSION < v"0.7.0-DEV.2915"
     const textwidth = Compat.Unicode.textwidth
     export textwidth