v0.8.0

• Update hidden read receipts to current MSC
• Add support for policy rules
• Support for v1 call events and use voip namespace (contributed by r0hit)
• Simplify unknown and redacted event handling
• Support listing, resolving and setting aliases
• Require Matrix v1.1
• Support the knock_restricted rule
• Get rid of redundant namespaces and using namespaces
• Remove support for groups
• Optionally disable implicit JSON conversions
• Support fallback keys
• Make sender_key optional
• Allow more base64 encodings for cross-signing events
• Use spdlog for logging
• Support reasons for knocking, joining leaving and inviting.
• Support initial state in createRoom