Bump httpclient5 from 5.1.2 to 5.1.3 in /NotificationHubs (#120)

Bumps [httpclient5](https://github.com/apache/httpcomponents-client) from 5.1.2 to 5.1.3.
- [Release notes](https://github.com/apache/httpcomponents-client/releases)
- [Changelog](https://github.com/apache/httpcomponents-client/blob/rel/v5.1.3/RELEASE_NOTES.txt)
- [Commits](apache/httpcomponents-client@rel/v5.1.2...rel/v5.1.3)

---
updated-dependencies:
- dependency-name: org.apache.httpcomponents.client5:httpclient5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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NotificationHubs/pom.xml

@@ -195,7 +195,7 @@
     <dependency>
       <groupId>org.apache.httpcomponents.client5</groupId>
       <artifactId>httpclient5</artifactId>
-      <version>5.1.2</version>
+      <version>5.1.3</version>
       <exclusions>
         <exclusion>
           <groupId>org.apache.httpcomponents.core5</groupId>