Bump junit from 4.11 to 4.12

Bumps [junit](https://github.com/junit-team/junit) from 4.11 to 4.12.
- [Release notes](https://github.com/junit-team/junit/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/master/doc/ReleaseNotes4.12.md)
- [Commits](junit-team/junit4@r4.11...r4.12)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot-support

pom.xml

@@ -21,7 +21,7 @@
         <abstract-operator.version>0.2.2</abstract-operator.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <kotlin.version>1.2.60</kotlin.version>
-        <junit.version>4.11</junit.version>
+        <junit.version>4.12</junit.version>
     </properties>
 
     <dependencies>