Update dependency org.jetbrains:annotations to v26

Author: renovate[bot]

gradle.properties

@@ -7,7 +7,7 @@ rxjava.version=2.2.21
 reactive-streams.version=1.0.4
 netty.version=4.1.115.Final
 jctools.version=2.1.2
-annotations.version=16.0.3
+annotations.version=26.0.1
 dagger.version=2.27
 slf4j.version=1.7.36
 reactor.version=3.3.4.RELEASE