IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Added reverse_mapping option, which can be used to make encoder compliant to spec #51
Fix handling of malformed inputs that have illegal unescaped-equals characters in extension field values (restores behaviour from ⇐ v5.0.3 in some edge-cases) #56
Heartbeat Input
Fixed shutdown concurrency issues by simplifying shutdown signal handling #15