Bump approvaltests from 9.3.0 to 15.7.0#143

dependabot[bot] wants to merge 1 commit intomasterLearnWithLlew/DuplicationKata.java:masterfrom

dependabot/gradle/com.approvaltests-approvaltests-15.7.0LearnWithLlew/DuplicationKata.java:dependabot/gradle/com.approvaltests-approvaltests-15.7.0Copy head branch name to clipboard