Fix versions of generated assemblies

The "Snapins" were attempting to load version 1.0.0.0, but for some
reason we were building with version 3.0.0.0.

System.Management.Automation/project.json

@@ -1,5 +1,5 @@
 {
-    "version": "3.0.0.0",
+    "version": "1.0.0.0",
     "description": "System.Management.Automation Class Library",
     "authors": [ "garretts", "andschwa" ],
     "tags": [ "" ],