release: 3.7.0-rc.1 (#8301)

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## Pre-Merge TODO
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.publishrc

@@ -8,7 +8,7 @@
     "gitTag": true
   },
   "confirm": false,
-  "publishTag": "latest",
+  "publishTag": "rc",
   "prePublishScript": "gulp test-server",
   "postPublishScript": "gulp docker-publish"
 }