Update Gradle, JUnit and Mockito

Author: Yeregorix

gradle/libs.versions.toml

@@ -12,10 +12,10 @@ gson = "2.10.1"
 guice = "5.0.1"
 ideaExt = "1.1.8"
 indra = "3.1.3"
-junit = "5.10.2"
+junit = "5.13.4"
 log4j = "2.22.1"
 math = "2.0.1"
-mockito = "5.11.0"
+mockito = "5.21.0"
 pluginSpi = "0.4.0"
 
 [libraries]