Bump netty-all from 4.1.6.Final to 4.1.42.Final in /sandbox#1

dependabot[bot] wants to merge 1 commit intomasterciphermagic/java-learn:masterfrom

dependabot/maven/sandbox/io.netty-netty-all-4.1.42.Finalciphermagic/java-learn:dependabot/maven/sandbox/io.netty-netty-all-4.1.42.FinalCopy head branch name to clipboard