Bump assertj-core from 3.9.0 to 3.13.1#13

dependabot-preview[bot] wants to merge 1 commit intoversion/1.12ldtteam/Animatrix:version/1.12from

dependabot/gradle/org.assertj-assertj-core-3.13.1ldtteam/Animatrix:dependabot/gradle/org.assertj-assertj-core-3.13.1Copy head branch name to clipboard