Bump junit from 4.12 to 4.13.1 in /java-examples/java-core#16

dependabot[bot] wants to merge 1 commit intomasterhellokoding/hellokoding-courses:masterfrom

dependabot/maven/java-examples/java-core/junit-junit-4.13.1hellokoding/hellokoding-courses:dependabot/maven/java-examples/java-core/junit-junit-4.13.1Copy head branch name to clipboard