Update elasticsearch requirement from <7.14 to <7.18 (#2689)

Updates the requirements on [elasticsearch](https://github.com/elastic/elasticsearch-py) to permit the latest version.
- [Release notes](https://github.com/elastic/elasticsearch-py/releases)
- [Commits](elastic/elasticsearch-py@0.4.1...v7.17.9)

---
updated-dependencies:
- dependency-name: elasticsearch
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -16,7 +16,7 @@
     "urllib3>=1.26,<3",
     "eve>=1.1.2,<=2.1.0",
     "eve-elastic>=7.4.0,<7.5.0",
-    "elasticsearch<7.14",  # we are using oss version on test server
+    "elasticsearch<7.18",  # we are using oss version on test server
     "flask>=1.1,<1.2",
     "flask-mail>=0.9,<0.11",
     "flask-script>=2.0.5,<3.0",