Merge branch '5.3.x'

# Conflicts:
#	build.gradle
#	spring-jdbc/src/main/java/org/springframework/jdbc/core/namedparam/NamedParameterUtils.java
#	spring-jdbc/src/test/java/org/springframework/jdbc/core/namedparam/NamedParameterUtilsTests.java
#	spring-r2dbc/src/main/java/org/springframework/r2dbc/core/NamedParameterUtils.java
#	spring-r2dbc/src/test/java/org/springframework/r2dbc/core/NamedParameterUtilsUnitTests.java

Author: jhoeller

build.gradle

@@ -89,7 +89,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "10.3.3"
+		toolVersion = "10.3.4"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}