Bump org.apache.httpcomponents:httpcore from 4.4.13 to 4.4.16

Bumps org.apache.httpcomponents:httpcore from 4.4.13 to 4.4.16.

---
updated-dependencies:
- dependency-name: org.apache.httpcomponents:httpcore
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -174,7 +174,7 @@
 
         <jre.version>1.8</jre.version>
         <httpcomponents.httpclient.version>4.5.13</httpcomponents.httpclient.version>
-        <httpcomponents.httpcore.version>4.4.13</httpcomponents.httpcore.version>
+        <httpcomponents.httpcore.version>4.4.16</httpcomponents.httpcore.version>
 
         <!-- Reactive Streams version -->
         <reactive-streams.version>1.0.4</reactive-streams.version>