ytkit 0.5.2

New script

• yt-config: Ytkit::Config wrapper script for calling Ytkit::Config from bash-like script.
• yt-repl-topology: Replication topology visualizer. --output allows "text", "json", "dot" and "member"

New feature

• yt-admin: Add subcommand purge
• yt-healthcheck: Add new option --fabric-no-candidate (default critical) #55
• yt-healthcheck: Add --role variation "primary", "source", "replica", "read", "standby", "secondary", "cascade"
• yt-alter-progress: Trim \n in displaying ALTER TABLE statement. #65

Miscellaneous

• yt-binlog-groupby: Refactoring
• CI test environments are now CentOS7 and CentOS8 Stream