bump com.puppycrawl.tools:checkstyle from 10.19.0 to 10.20.0 (via #2790)

Author: dependabot[bot]

build.gradle.kts

@@ -89,7 +89,7 @@ subprojects {
             dependency("com.github.spotbugs:spotbugs-annotations:4.8.6")
             dependency("com.github.spotbugs:spotbugs:4.8.6")
             dependency("com.opencsv:opencsv:5.9")
-            dependency("com.puppycrawl.tools:checkstyle:10.19.0")
+            dependency("com.puppycrawl.tools:checkstyle:10.20.0")
             dependency("com.squareup.retrofit2:converter-jackson:${comSquareupRetrofit2Version}")
             dependency("com.squareup.retrofit2:retrofit:${comSquareupRetrofit2Version}")
             dependency("commons-beanutils:commons-beanutils:1.9.4")