Upgrade to Kotlin 1.3.72

Closes gh-21199

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -144,7 +144,7 @@
 		<junit.version>4.12</junit.version>
 		<junit-jupiter.version>5.5.2</junit-jupiter.version>
 		<kafka.version>2.3.1</kafka.version>
-		<kotlin.version>1.3.71</kotlin.version>
+		<kotlin.version>1.3.72</kotlin.version>
 		<kotlin-coroutines.version>1.3.5</kotlin-coroutines.version>
 		<lettuce.version>5.2.2.RELEASE</lettuce.version>
 		<liquibase.version>3.8.8</liquibase.version>