support rooms v12; update deps

add warning when operators room is not configured; update deps

fix linter config

fix #1; update deps; update aux files

update schedule

matrix v1.11 authenticated media support

* add a warning for customers in encrypted rooms

* enhance redmine integration
* update deps

* Redmine integration

* MSC4144 integration
* update deps

- switch to pure Go, without CGO

- http stack migrated to echo, added /metrics auth
- send help message alongside invalid mapping error
- add customers' names into forwarded messages
- add automatic threads closing after 7 days of inactivity (not configurable yet)

* safer reaction forwarding

* fix duplicated prefix and suffix on completed requests
* add missing `!ho help` entries
* add new `!ho count` command
* count requests by homeserver and by MXID
* add new `!ho config` command set - configure honoroit directly from the chat
* mautrix-go 0.15.x+ migration
* shared secret auth support
* account data encyption support

removed env vars (automatic migration):

* HONOROIT_TEXT_*
* HONOROIT_ALLOWEDUSERS
* HONOROIT_IGNOREDROOMS
* HONOROIT_IGNORENOTHREAD
* HONOROIT_NOENCRYPTION