Merge pull request #505 from line/dependabot/gradle/org.jetbrains.kotlin-kotlin-gradle-plugin-1.3.72

Bump kotlin-gradle-plugin from 1.3.71 to 1.3.72

Author: kazuki-ma

build.gradle

@@ -21,7 +21,7 @@ import org.springframework.boot.gradle.plugin.SpringBootPlugin
 
 buildscript {
     ext {
-        kotlin_version = '1.3.71'
+        kotlin_version = '1.3.72'
         spring_boot_version = '2.2.6.RELEASE'
     }