Fix failure to store installation state, store repositories in a set

package_manager/bpkg/types.py

@@ -16,7 +16,7 @@ class Package:
         self.url     = ""
         self.files   = []
 
-        self.repositories = []
+        self.repositories = set()
         self.installed_location = None
         self.module_name = None
 
@@ -288,7 +288,7 @@ class ConsolidatedPackage:
 
         for pkg in self:
             if pkg == newpkg:
-                pkg.repositories
+                pkg.repositories.union(newpkg.repositories)
                 if newpkg.installed:
                     pkg.set_installed_metadata(newpkg)
                 break