v1.30.1

This is a special holiday edition version of ntfy, with all sorts of holiday fun and games, and hidden quests.
Nahh, just kidding. This release is an intermediate release mainly to eliminate warnings in the logs, so I can
roll out the TLSv1.3, HTTP/2 and Unix mode changes on ntfy.sh (see #552).

Features:

• Web: Generate random topic name button (#453, thanks to @yardenshoham)
• Add Gitpod config (#540, thanks to @yardenshoham)

Bug fixes + maintenance:

• Remove --env-topic option from ntfy publish as per deprecation (no ticket)
• Prepared statements for message cache writes (#542, thanks to @nicois)
• Do not warn about invalid IP address when behind proxy in unix socket mode (relates to #552)