Bump hystrix-core from 1.5.2 to 1.5.18

Bumps [hystrix-core](/~https://github.com/Netflix/Hystrix) from 1.5.2 to 1.5.18.
- [Release notes](/~https://github.com/Netflix/Hystrix/releases)
- [Changelog](/~https://github.com/Netflix/Hystrix/blob/master/CHANGELOG.md)
- [Commits](Netflix/Hystrix@v1.5.2...v1.5.18)

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

generator/io.vertx/vertx-circuit-breaker/pom.xml

@@ -23,7 +23,7 @@
 
     <!-- language=json -->
     <npm-optional-dependencies>["@vertx/web"]</npm-optional-dependencies>
-    <hystrix.version>1.5.2</hystrix.version>
+    <hystrix.version>1.5.18</hystrix.version>
   </properties>
 
   <dependencies>