8.0.0-M6

What's Changed

• remove bouncycastle dependency by @jpdahlke in #590
• remove obsolete language attribute by @dev-mlb in #580
• make transformhistory serializable by @dev-mlb in #581
• update httpclient call to use a response handler by @dev-mlb in #575
• rename/remove sep methods by @jpdahlke in #589
• jetty 10.0.15 by @dev-mlb in #595
• KffFile cleanup by @drivenflywheel in #593

Full Changelog: 8.0.0-M5...8.0.0-M6