Add getEmsVersion method (elastic#204)

* Add getEmsVersion method

* Add PR number

Author: jsanz

CHANGELOG.md

@@ -6,7 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [8.5.1] TBD
 
 - Update release documentation #194
-- Include OpenAPI specification #196
+- Include OpenAPI specification #196 #197
+- Add a new `getEmsVersion` method #204
 
 ## [8.5.0] - 2023-08-23
 

src/ems_client.ts

@@ -347,6 +347,10 @@ export class EMSClient {
     return this._cache.get(layerId);
   }
 
+  getEmsVersion(): string {
+    return this._emsVersion;
+  }
+
   getTileApiUrl(): string {
     return this._tileApiUrl;
   }