v2.3.0

This release primarily fixes an issue with delayed messages, and it adds support for Go's profiler (if enabled), which will allow investigating usage spikes in more detail. There will likely be a follow-up release this week to fix the actual spikes caused by iOS devices.

Features:

• ntfy now supports Go's pprof profiler, if enabled (relates to #677)

Bug fixes + maintenance:

• Fix delayed message sending from authenticated users (#679)
• Fixed plural for Polish and other translations (#678, thanks to @bmoczulski)