Upgrade to RxJava 3.1.5.

See #1737

Author: mp911de

parent/pom.xml

@@ -123,7 +123,7 @@
 		<rxjava>1.3.8</rxjava>
 		<rxjava-reactive-streams>1.2.1</rxjava-reactive-streams>
 		<rxjava2>2.2.21</rxjava2>
-		<rxjava3>3.1.4</rxjava3>
+		<rxjava3>3.1.5</rxjava3>
 		<smallrye-mutiny>1.1.2</smallrye-mutiny>
 		<slf4j>1.7.32</slf4j>
 		<spring>5.3.20</spring>