Bump elasticsearch from 15.5.0 to 16.6.0

Bumps [elasticsearch](https://github.com/elastic/elasticsearch-js-legacy) from 15.5.0 to 16.6.0.
- [Release notes](https://github.com/elastic/elasticsearch-js-legacy/releases)
- [Changelog](https://github.com/elastic/elasticsearch-js-legacy/blob/16.x/docs/changelog.asciidoc)
- [Commits](elastic/elasticsearch-js-legacy@v15.5.0...v16.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -11,7 +11,7 @@
   "author": "O.C. Tanner",
   "license": "Apache-2.0",
   "dependencies": {
-    "elasticsearch": "15.5.0",
+    "elasticsearch": "16.6.0",
     "node-jose": "^1.1.3",
     "pg": "^7.17.1",
     "uuid": "2.0.3"