bump of Gradle, Kotlin and log4j versions

gradle.properties

@@ -2,11 +2,11 @@ kotlin.code.style=official
 
 woggioniMavenRepositoryUrl=https://woggioni.net/mvn/
 
-version.gradle=7.2
+version.gradle=7.3.3
 version.multiReleaseJarPlugin=0.1
 version.klevtree=1.0
 version.jwo=1.0
 version.junitJupiter=5.7.2
 version.slf4j=1.7.32
-version.kotlin=1.5.31
-version.log4j2=2.14.1
+version.kotlin=1.6.10
+version.log4j2=2.17.1