Excavator: Auto-label some excavator PRs (#478)

Author: svc-excavator-bot

.excavator.yml

@@ -1,5 +1,11 @@
+# Excavator auto-updates this file. Please contribute improvements to the central template.
+
 auto-label:
   names:
+    versions-props/upgrade-all: [ "merge when ready" ]
     circleci/manage-circleci: [ "merge when ready" ]
   tags:
+    donotmerge: [ "do not merge" ]
+    roomba: [ "merge when ready" ]
     automerge: [ "merge when ready" ]
+    autorelease: [ "autorelease" ]