fix: upgrade io.dropwizard:dropwizard-client from 2.0.21 to 2.1.5

Snyk has created this PR to upgrade io.dropwizard:dropwizard-client from 2.0.21 to 2.1.5.

See this package in Maven Repository:
https://mvnrepository.com/artifact/io.dropwizard/dropwizard-client/

See this project in Snyk:
https://app.snyk.io/org/jonghuc/project/d476e683-8417-492e-af97-ec1f107207f4?utm_source=github&utm_medium=referral&page=upgrade-pr

elasticsearch/autocomplete/pom.xml

@@ -27,7 +27,7 @@
     <checkstyle.config.location>https://raw.githubusercontent.com/knaw-huc/checkstyle/master/checkstyle_config.xml
     </checkstyle.config.location>
 
-    <dropwizard.version>2.0.21</dropwizard.version>
+    <dropwizard.version>2.1.5</dropwizard.version>
     <json-path.version>2.5.0</json-path.version>
     <mockito-core.version>3.0.0</mockito-core.version>
     <mockserver.version>5.4.1</mockserver.version>