Increment version to 2.18.0.0 (#919)

Signed-off-by: opensearch-ci-bot <opensearch-infra@amazon.com>
Co-authored-by: opensearch-ci-bot <opensearch-infra@amazon.com>

Author: opensearch-trigger-bot[bot]

package.json

@@ -58,4 +58,4 @@
     "braces": "^3.0.3",
     "micromatch": "^4.0.8"
   }
-}
+}