Set version to 8.4.0

Author: sethmlarson

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@elastic/elasticsearch",
-  "version": "8.4.2",
-  "versionCanary": "8.4.2-canary.0",
+  "version": "8.4.0",
+  "versionCanary": "8.4.0-canary.2",
   "description": "The official Elasticsearch client for Node.js",
   "main": "index.js",
   "types": "index.d.ts",
@@ -91,4 +91,4 @@
     "coverage": false,
     "check-coverage": false
   }
-}
+}