v0.12.2

• Added utility method to redact bridge commands.
• Added thread ID field to read receipts to match Matrix v1.4 changes.
• Added automatic fetching of media repo config at bridge startup to make it easier for bridges to check homeserver media size limits.
• Added wrapper for the /register/available endpoint.
• Added custom user agent to all requests mautrix-go makes. The value can be customized by changing the DefaultUserAgent variable.
• Implemented MSC3664, MSC3862 and MSC3873 in the push rule evaluator.
• Added workaround for potential race conditions in OTK uploads when using appservice encryption (MSC3202).
• Fixed generating registrations to use .+ instead of [0-9]+ in the username regex.
• Fixed panic in megolm session listing methods if the store contains withheld key entries.
• Fixed missing header in bridge command help messages.