feat(upgrade): add upgrade-count and upgrade-strategy outputs

Author: christopherthielen

actions/upgrade/action.yml

@@ -15,6 +15,10 @@ inputs:
 outputs:
   upgrades: # id of output
     description: 'The packages@versions that were updated'
+  upgrade-count:
+    description: 'The number of packages that were updated'
+  upgrade-strategy:
+    description: 'A description of the strategy used either a) latest or b) matching semver range'
 runs:
   using: 'docker'
   image: 'Dockerfile'