fix: upgrade org.reactivestreams:reactive-streams from 1.0.3 to 1.0.4 (#1632)

Snyk has created this PR to upgrade org.reactivestreams:reactive-streams from 1.0.3 to 1.0.4.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.reactivestreams/reactive-streams/

See this project in Snyk:
https://app.snyk.io/org/openfeign/project/4431a6a8-1e77-4c40-95be-04fdef0e4526?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

reactive/pom.xml

@@ -29,7 +29,7 @@
   <properties>
     <main.basedir>${project.basedir}/..</main.basedir>
     <reactor.version>3.4.18</reactor.version>
-    <reactive.streams.version>1.0.3</reactive.streams.version>
+    <reactive.streams.version>1.0.4</reactive.streams.version>
     <reactivex.version>2.2.21</reactivex.version>
   </properties>