v0.14.4

• Bumped minimum yarl version to 1.5. v1.4 and below didn't allow URL.build() with a scheme but no host, which is used in the matrix: URI generator that was added in v0.14.3.
• (appservice) Removed support for adding a group_id to user namespaces in registration files.
• (types) Updated Serializable.parse_json type hint to allow bytes in addition to str (because json.loads allows both).
• (bridge) Added retry_num parameter to User.send_remote_checkpoint.