buscarron v1.4.0

[etkecc]

Warning: CI pipeline is in progress

changelog:

• add rejected submissions redirect option
• add prometheus metrics on /metrics endpoint with basic auth
• add email and domain values (if present within submission) to matrix event properties
• fix rare case with nil postmark client
• migrate to mautrix-go 0.17.x
• lower validator log level to warn
• do not ban for technical endpoints (like /metrics)
• customizable message template
• support json submissions (Content-Type: application/json)
• submissions are sent with m.notice msg type

new env vars:

• BUSCARRON_NAME_REDIRECT_REJECT
• BUSCARRON_NAME_RATELIMIT_SHARED (missed in v1.3.1)
• BUSCARRON_NAME_TEXT

removed env vars:

• BUSCARRON_NOENCRYPTION