Upgrade slf4j 1.7.26

Author: slandelle

pom.xml

@@ -428,7 +428,7 @@
     <source.property>1.8</source.property>
     <target.property>1.8</target.property>
     <netty.version>4.1.36.Final</netty.version>
-    <slf4j.version>1.7.25</slf4j.version>
+    <slf4j.version>1.7.26</slf4j.version>
     <reactive-streams.version>1.0.2</reactive-streams.version>
     <activation.version>1.2.0</activation.version>
     <netty-reactive-streams.version>2.0.0</netty-reactive-streams.version>