This update brings some improvements and bugfixes to bugs that slipped into 4.5.0 release.
Special thanks to @Fuzzlemann and @Sprungente for contributions!

New

• H2 database support by Fuzzlemann, you can use /plan m move sqlite h2 to migrate your current database.

Improvements

• German locale improvements by Sprungente
• Small performance improvements to decimal formatting & medians by Fuzzlemann
• Large performance improvements to /server/raw/ (Server data JSON) by Fuzzlemann

Bugfixes

• Fixed issues with logging in on servers when Plan and ViaVersion were both installed on BungeeCord
• Fixed issue where TPS was 0 on Spigot & Bukkit
• Fixed sessions not being saved on server shutdown
• [Unit tests] Several issues with test flakiness (JVM crashing / flaky db test) fixed by Fuzzlemann.

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If you get any errors or have issues don't be afraid to join the Support on Discord or report the issue (This one is easier for me). Cheers!