Merge branch '5.3.x'

Author: snicoll

build.gradle

@@ -28,7 +28,7 @@ configure(allprojects) { project ->
 	dependencyManagement {
 		imports {
 			mavenBom "com.fasterxml.jackson:jackson-bom:2.13.0"
-			mavenBom "io.netty:netty-bom:4.1.70.Final"
+			mavenBom "io.netty:netty-bom:4.1.72.Final"
 			mavenBom "io.projectreactor:reactor-bom:2020.0.14-SNAPSHOT"
 			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR10"
 			mavenBom "io.rsocket:rsocket-bom:1.1.1"